Product Overview The poly-pro wheel is one of our caster staples, providing plenty of durability with a firm tread. The polyurethane tread protects surfaces, and the annular bearings roll very smoothly. These wheels work best for indoor applications; for outdoor use, please take a look at our Polymadic wheel casters with UV-resistant materials. Tread: Polyurethane, Non-Marking, Mechanically Locked To Core This caster is listed with wheel diameter 4", tread width 1-1/4", load capacity 350 Lbs., tread type Polyurethane, Non-Marking, Mechanically Locked To Core, and bearing type Annular Ball Bearing. Key Features Load Capacity: 350 Lbs. Wheel Diameter: 4" Tread Width: 1-1/4" Tread: Polyurethane, Non-Marking, Mechanically Locked To Core Bearing: Annular Ball Bearing Temperature Range: -20 ° F to 180° F Ideal For Choose this product if you need: A caster matching the listed wheel, capacity, and mounting specifications Loads within the listed 350 Lbs rating Applications matching the listed 4" x 1-1/4" wheel dimensions Applications needing the listed Polyurethane, Non-Marking, Mechanically Locked To Core wheel or tread Not Ideal For Not ideal when the load exceeds 350 Lbs, the equipment requires a wheel other than 4" diameter by 1-1/4" tread width, a brake or swivel lock is required but not listed, or the operating temperature is outside -20 ° F to 180° F. Product Details Review the product details below to confirm the wheel diameter, tread width, load capacity, wheel or tread material, bearing, overall height, and temperature range match the caster required for your equipment. Shared Product Details Brand Durable Superior Casters Load Capacity 350 Lbs. Wheel Diameter 4" Tread Width 1-1/4" Tread Type Polyurethane, Non-Marking, Mechanically Locked To Core Core Type Polyolefin Core Bearing Type Annular Ball Bearing Wheel Color Gray/Gray Overall Height 5" Swivel Radius 3-13/32" Durometer Shore D 55 (+/-5) Temperature Range -20 ° F to 180° F Model / MPN 75PP40GI4456YY Frequently Asked Questions What is this product used for? Use it when you need a caster matching the listed wheel, capacity, and mounting specifications. What should I check before ordering? Confirm the wheel diameter, tread width, load capacity, and bearing or bore shown in Product Details against the equipment being fitted. What temperature range is listed? The original product data lists a temperature range of -20 ° F to 180° F. Related Resources Need help confirming fit? Review the importance of caster brakes before ordering.