8" High Elevations Industrial Grade Plastic Hand Cup for Flat Surfaces
Wood's Powr-Grip N4100 — 8" Industrial-Grade Plastic High-Elevation Hand Cup for Flat Surfaces (100 lbs / 45 kg, Rated to 12,000 ft / 3,650 m) The Wood's Powr-Grip N4100 is a speci alized vacuum hand cup engineered specifically for use at high elevations, rated for operation up to 12,000 feet (3,650 meters) — more than double the 5,000 ft maximum elevation of all standard WPG hand cups. Featuring an 8" (20 cm) standard rubber suction pad (Model G0695), an all industrial-grade plastic handle and plunger, and a rated load capacity of 100 lbs (45 kg), the N4100 is the purpose-built solution for glaziers, construction crews, and material handlers working on high-altitude job sites — including mountain resort construction, high-elevation commercial buildings, alpine infrastructure projects, and any application above 5,000 ft where standard hand cups are not rated for use. The N4100 (SKU: 91403, Model: N4100) is manufactured by Wood's Powr-Grip and ships with a protective carrying case. The N4100 exists because vacuum-based lifting tools are directly affected by atmospheric pressure, which decreases as elevation increases. At sea level, standard hand cups achieve their rated holding force because atmospheric pressure is at its maximum. As elevation rises, atmospheric pressure drops — reducing the pressure differential that creates the vacuum seal and directly reducing the maximum achievable holding force. Standard WPG hand cups are rated to 5,000 ft because their vacuum mechanisms and load ratings are calibrated for atmospheric conditions at or below that elevation. The N4100 uses a modified vacuum mechanism specifically engineered to maintain reliable vacuum performance at atmospheric pressures corresponding to elevations up to 12,000 ft, with a 100 lb load rating that reflects the reduced vacuum force achievable at high altitude. If your job site is above 5,000 ft, the N4100 is the only WPG hand cup in this lineup rated for your conditions. Key Features & Benefits 12,000 ft (3,650 m) Maximum Elevation Rating — The Only High-Altitude WPG Hand Cup The N4100 is specifically designed and rated for use at elevations up to 12,000 ft (3,650 m), covering the full range of high-altitude construction and installation environments encountered in mountain resort development, alpine commercial construction, high-elevation infrastructure projects, and elevated urban job sites. No other standard WPG hand cup in this lineup is rated above 5,000 ft — the N4100 is the mandatory selection for any application above that threshold. Using a standard 5,000 ft-rated cup above its elevation limit is unsafe and will result in reduced holding capacity without warning. 100 lb (45 kg) Rated Load Capacity at High Elevation The N4100 is rated for loads up to 100 lbs (45 kg) on flat, smooth, nonporous surfaces. The lower capacity compared to the standard N4000 (125 lb) reflects the reduced atmospheric pressure at high elevation — the vacuum mechanism is engineered to achieve reliable holding force at altitude, but the maximum achievable vacuum force is inherently lower than at sea level due to the reduced pressure differential. The 100 lb rating represents the safe working load at the maximum rated elevation of 12,000 ft; actual holding force will be higher at lower elevations within the rated range. Always use the N4100’s 100 lb rating as the governing limit regardless of actual job site elevation. Industrial-Grade Plastic Handle and Plunger — Lightweight and Rust-Resistant The all industrial-grade plastic handle and plunger construction makes the N4100 lightweight and rust-resistant — important characteristics for high-altitude job sites where tools may be exposed to variable weather, moisture, and temperature swings. The lightweight construction reduces operator fatigue during extended use at altitude, where physical exertion is already more demanding due to reduced oxygen levels. Industrial-grade plastic resists corrosion in wet, snowy, and alpine environments where metal handles would require additional maintenance. 8" Standard Rubber Suction Pad (Model G0695) The 8" (20 cm) G0695 pad creates a reliable vacuum seal on flat, smooth, nonporous surfaces across the rated operating temperature range. The G0695 pad is the same model used on the N4000 and N4300, making replacement pads interchangeable across all three models — simplifying pad inventory management for operations that stock multiple WPG cup models. Replacement pads are available separately through Wood's Powr-Grip authorized distributors. Fast Attach and Release Mechanism The quick-engage vacuum mechanism is specifically engineered to achieve reliable vacuum formation at high-altitude atmospheric pressures, where standard cup mechanisms may require more pumping effort or fail to achieve adequate vacuum. The fast attach and release design supports efficient workflows on high-altitude job sites where working conditions are already more demanding. Always verify the vacuum indicator before lifting at any elevation within the rated range. Red-Line Vacuum Loss Indicator — Protective Carrying Case Included The built-in red-line indicator provides a continuous visual warning if vacuum pressure drops significantly during a lift. At high elevation, where atmospheric pressure is lower and the vacuum margin is reduced, the vacuum indicator is an especially critical safety check — monitor it before and throughout every lift. The N4100 ships with a protective carrying case that keeps the pad clean and protected during transport to and from high-altitude job sites. Common Applications Mountain Resort and Alpine Construction Glazing Glaziers installing glass panels, curtain wall systems, and architectural glass at mountain resort developments, ski lodges, and alpine commercial buildings above 5,000 ft use the N4100 as the only WPG-rated hand cup for their elevation. The 100 lb capacity covers the majority of standard glass panel sizes encountered in resort and lodge construction. High-Elevation Commercial and Residential Construction Construction crews working on commercial and residential projects in high-altitude cities and regions — including locations in the Rocky Mountains, Sierra Nevada, Andes, Alps, and other elevated regions — use the N4100 for glass, stone, and panel handling where job site elevation exceeds 5,000 ft. The 12,000 ft rating covers virtually all inhabited construction environments worldwide. Alpine Infrastructure and Utility Projects Infrastructure and utility construction at high elevation — including mountain telecommunications facilities, alpine power stations, high-altitude water treatment plants, and mountain road and tunnel projects — may require glass, panel, or stone handling where the N4100 is the only rated vacuum hand cup option. High-Altitude Stone and Tile Installation Stone fabricators and tile installers working on high-elevation projects use the N4100 to lift and position polished granite, marble, and large-format tile on flat surfaces at job sites above 5,000 ft. The 100 lb capacity covers most standard countertop sections and tile panels encountered in high-altitude residential and commercial installation work. Flat Glass and Panel Handling Above 5,000 ft Any flat glass, smooth stone, or nonporous panel handling application at elevations above 5,000 ft requires the N4100 — no other standard WPG hand cup in this lineup is rated for use above that threshold. The N4100 is the correct and only safe choice for these conditions. Compatible Materials Plate glass and float glass (flat) Tempered and laminated safety glass (flat) Polished granite, marble, and quartzite (flat) Engineered stone and quartz composite (flat) Glazed and polished ceramic tile (flat) Polished porcelain tile — large format (flat) Smooth painted or coated metal panels (flat) Any smooth, nonporous flat surface at elevations up to 12,000 ft (3,650 m) Not compatible with: curved surfaces (flat only); rough, textured, or porous surfaces; elevations above 12,000 ft (3,650 m); loads exceeding 100 lbs (45 kg); concrete, brick, unpolished stone, wood, or drywall. Product Documents N4100 High-Elevation Instructions (PDF) N4100 Troubleshooting Guide (PDF) Application Instructions Step 1: Elevation and Surface Assessment Confirm your job site elevation — if above 5,000 ft (1,500 m), the N4100 is required; standard WPG hand cups are not rated for use above this threshold. Confirm the surface is smooth, flat, and nonporous — do not proceed on rough, textured, porous, or curved surfaces. Clean the pad contact area — remove dust, oil, moisture, and debris. Verify the panel weight does not exceed 100 lbs (45 kg). Step 2: Pad Inspection and Preparation Inspect the G0695 suction pad for cuts, cracks, hardening, or contamination. Replace if damaged. Wipe the pad face clean before each lift. Ensure the pad is at operating temperature (above 10°F / -12°C) before use — temperature drops at high elevation can affect pad flexibility. Step 3: Attaching the Cup at High Elevation Position the pad flat against the surface with full perimeter contact across the 8" diameter. Engage the vacuum mechanism — at high elevation, the reduced atmospheric pressure means the vacuum mechanism is working against a lower pressure differential; pump until firm resistance is felt and the red-line indicator confirms full vacuum. Check the red-line vacuum indicator — confirm it shows a stable, full vacuum before lifting. This step is especially critical at high elevation where the vacuum margin is reduced. Apply a controlled test load (firm downward pull) to verify seal integrity before committing to the full lift. Step 4: Lifting, Positioning, and Release Lift smoothly — avoid sudden jerking motions that can break the vacuum seal, particularly important at high elevation where the vacuum margin is lower than at sea level. Monitor the red-line indicator continuously throughout the lift — at high elevation, any vacuum loss must be treated as an immediate stop condition. Do not exceed the 100 lb (45 kg) rated load capacity. Lower the load fully to a stable surface before releasing the vacuum. Engage the release mechanism slowly and in a controlled manner. Clean the pad after use and store in the supplied protective carrying case. Technical Specifications Specification Details Model N4100 SKU 91403 Vendor Wood's Powr-Grip Load Capacity 100 lbs [45 kg] Pad Diameter 8" [20 cm] Pad Model G0695 Rubber Type Standard Handle Type Industrial-Grade Plastic Plunger Type Industrial-Grade Plastic Surface Texture Required Smooth Material Porosity Required Nonporous Allowable Surface Curvature Flat only Ideal Uses High-elevation job sites above 5,000 ft Maximum Elevation 12,000 ft [3,650 m] Operating Temperature Range 10°F to 120°F [-12°C to 49°C] Vacuum Loss Indicator Yes (red-line) Includes Protective carrying case Safety Data Summary Hazard Information Do not use standard WPG hand cups above 5,000 ft (1,500 m) — they are not rated for high-elevation atmospheric conditions and will have reduced holding capacity without warning At high elevation, reduced atmospheric pressure lowers the maximum achievable vacuum force — the 100 lb rating accounts for this; never attempt to lift loads rated for sea-level cups using the N4100 Vacuum loss during a lift can result in sudden load drop, causing serious injury or property damage — the reduced vacuum margin at high elevation makes the red-line indicator even more critical Overloading beyond 100 lbs (45 kg) rated capacity may cause sudden cup release without warning Do not use above 12,000 ft (3,650 m) — the N4100 is not rated for elevations above this threshold Use on curved, rough, textured, or porous surfaces will prevent a full pad seal — flat surfaces only Damaged or contaminated suction pads must be replaced before use Temperature drops at high elevation can affect pad flexibility — verify pad condition before use in cold alpine environments Personal Protective Equipment Safety glasses or face shield when handling glass panels Cut-resistant gloves rated for glass and stone handling Steel-toed safety footwear appropriate for high-altitude terrain Hard hat when working in overhead or multi-level environments Appropriate cold-weather and altitude PPE per job site safety plan for high-elevation work environments Safe Handling Confirm job site elevation before selecting a hand cup — use the N4100 for any elevation above 5,000 ft Inspect the pad and clean the contact area before each lift Never exceed the rated 100 lb load capacity Monitor the red-line indicator continuously — at high elevation, treat any vacuum loss as an immediate stop condition Apply a test load before every lift — the reduced vacuum margin at altitude makes this step non-negotiable Store in the supplied carrying case to protect the pad between uses Frequently Asked Questions Q: Why can’t I use a standard WPG hand cup above 5,000 ft?A: Vacuum-based lifting tools rely on atmospheric pressure to create holding force — the vacuum inside the cup is maintained against the surrounding atmospheric pressure, and the difference between the two creates the suction. As elevation increases, atmospheric pressure decreases, which reduces the pressure differential and directly reduces the maximum holding force the cup can achieve. Standard WPG hand cups are rated and load-tested at atmospheric conditions up to 5,000 ft. Above that elevation, their holding capacity is reduced in ways that are not reflected in their published load ratings, making them unsafe for rated-load use. The N4100 is specifically engineered and rated for the atmospheric conditions at elevations up to 12,000 ft. Q: Why is the N4100’s load capacity lower than the standard N4000?A: The N4100’s 100 lb capacity (vs. 125 lb on the N4000) reflects the reduced atmospheric pressure at high elevation. Both cups use the same 8" G0695 pad, but the N4100’s load rating is calibrated for the lower pressure differential achievable at elevations up to 12,000 ft. The 100 lb rating is the safe working load at the maximum rated elevation; actual holding force will be higher at lower elevations within the rated range, but always use 100 lbs as the governing limit. Q: What elevations is the N4100 designed for?A: The N4100 is designed for job sites above 5,000 ft (1,500 m) where standard WPG hand cups are not rated, up to a maximum of 12,000 ft (3,650 m). It can also be used at elevations below 5,000 ft, where its holding force will be higher than at altitude — but for sea-level and low-elevation applications, the standard N4000 (125 lb) or N5000 (150 lb) provide higher load ratings. Q: Is the G0695 pad on the N4100 the same as on the N4000 and N4300?A: Yes. All three models use the G0695 standard rubber pad (8" diameter), making replacement pads interchangeable across the N4000, N4100, and N4300. This simplifies pad inventory management for operations that stock multiple WPG cup models. Q: What replacement pad does the N4100 use?A: The N4100 uses the G0695 standard rubber pad (8" diameter). Replacement pads are available separately through Wood's Powr-Grip authorized distributors. Q: Is this product made to order?A: Yes. This product is made to order and all sales are final. Please confirm your job site elevation, surface type, and load requirements before placing your order. California Residents: ⚠️ WARNING: Cancer and/or Reproductive Harm — www.p65Warnings.ca.gov