Yellow Plug Caps for 12 mm and 16 mm Test Tubes, 1000/Bag These Globe Scientific Yellow Plug Caps provide a secure snap-fit seal for standard glass and plastic test tubes used in microbiology, clinical sample storage, and general benchtop workflows. Bright yellow coloring supports rapid visual sorting and color-coded sample tracking across high-throughput racks. Each cap pushes firmly into the tube rim to limit evaporation and cross-contamination during handling and short-term storage. Technical Specifications Product Type Plug Cap Volume/Size 12 mm and 16 mm tube diameters Material Polyethylene Closure/Cap Push-in plug, snap-fit Color Yellow Sterility Non-sterile Pack Size 1000 per bag Available Sizes Size SKU Price (per bag of 1000) 12 mm 118139Y $39.20 16 mm 116142Y $55.50 Applications Sealing microbiology culture tubes during incubation and transport Color-coding patient or batch samples in clinical and reference labs Capping serological and dilution tubes on the bench Short-term storage of aqueous reagents and standards Organizing tube racks by assay or workflow stage Limiting evaporation in stored aliquots between processing steps Quality & Procurement labsupplies.com is an authorized Globe Scientific dealer shipping from US inventory. Each bag carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Frequently Asked Questions What tube diameters do these plug caps fit? Two sizes are offered: a 12 mm cap (SKU 118139Y) and a 16 mm cap (SKU 116142Y). Select the size matching your tube's outer rim diameter for a snug snap-fit seal. Are these caps sterile? No, the caps are supplied non-sterile. For sterile workflows, autoclave or sanitize per your validated lab protocol before use, confirming polyethylene tolerance for your method. How are the caps packaged and sold? Both sizes ship in bags of 1000, and the listed price is per bag. Lot numbers on each bag support sample traceability requirements. Can the yellow color be used for sample coding? Yes. The consistent bright yellow finish makes these caps well suited to color-coded organization by assay, batch, or processing stage in busy racks. { "@context": "https://schema.org", "@type": "Product", "name": "Globe Scientific Yellow Plug Caps, 12 mm & 16 mm, 1000/Bag", "brand": { "@type": "Brand", "name": "Globe Scientific" }, "description": "Yellow polyethylene push-in plug caps for 12 mm and 16 mm test tubes, snap-fit closure, 1000 per bag.", "offers": { "@type": "AggregateOffer", "priceCurrency": "USD", "lowPrice": "39.20", "highPrice": "55.50", "offerCount": "2", "offers": [ { "@type": "Offer", "sku": "118139Y", "price": "39.20", "priceCurrency": "USD" }, { "@type": "Offer", "sku": "116142Y", "price": "55.50", "priceCurrency": "USD" } ] } } { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What tube diameters do these plug caps fit?", "acceptedAnswer": { "@type": "Answer", "text": "Two sizes are offered: a 12 mm cap (SKU 118139Y) and a 16 mm cap (SKU 116142Y). Select the size matching your tube's outer rim diameter for a snug snap-fit seal." } }, { "@type": "Question", "name": "Are these caps sterile?", "acceptedAnswer": { "@type": "Answer", "text": "No, the caps are supplied non-sterile. For sterile workflows, autoclave or sanitize per your validated lab protocol before use, confirming polyethylene tolerance for your method." } }, { "@type": "Question", "name": "How are the caps packaged and sold?", "acceptedAnswer": { "@type": "Answer", "text": "Both sizes ship in bags of 1000, and the listed price is per bag. Lot numbers on each bag support sample traceability requirements." } }, { "@type": "Question", "name": "Can the yellow color be used for sample coding?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. The consistent bright yellow finish makes these caps well suited to color-coded organization by assay, batch, or processing stage in busy racks." } } ] }
