Red Flange Plug Caps for 12, 13 & 16 mm Test Tubes — 1000/Case These Globe Scientific Flange Plug Caps deliver a secure, push-in seal for round-bottom and culture tubes across three common diameters. Molded in red polyethylene for fast visual identification, they suit sample storage, specimen transport, and routine clinical or research tube closure where reliable retention matters at the bench. Technical Specifications Product Type Flange Plug Cap Size (range across variants) 12 mm, 13 mm, 16 mm tube ID Material Polyethylene Closure/Cap Flange plug, push-in Color Red Sterility Non-sterile Pack Size 1000 caps per case Available Sizes Size SKU Price (per case of 1000) 12 mm 118127R $36.70 13 mm 118240R $37.00 16 mm 116152R $51.20 Applications Sealing serum and specimen tubes during cold or ambient storage Closing culture tubes for microbiology and media work Color-coded tube identification within mixed sample racks Capping centrifuge and round-bottom tubes after aliquoting Secure transport of capped samples between labs or departments General test tube closure for teaching and clinical bench protocols Quality & Procurement Order from labsupplies.com, an authorized Globe Scientific dealer shipping from US inventory. Each case carries lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Frequently Asked Questions Which tube diameter does each cap fit? Each variant is sized to the tube inner diameter: 12 mm, 13 mm, or 16 mm. Match the cap size to your tube's bore for a snug flange plug seal; confirm tube ID against the manufacturer's spec before ordering. Are these caps sterile? No. The flange plug caps are supplied non-sterile. If your workflow requires sterility, validate an in-house autoclave or chemical sterilization step against polyethylene's temperature limits before use. What material are the caps made from? They are molded from polyethylene, a flexible plastic that provides a friction-fit closure and tolerates standard refrigerated and ambient storage. Polyethylene is not recommended for autoclave cycles at elevated temperatures. How many caps come in a case? Prices are per case of 1000 caps. The 12 mm case is $36.70, 13 mm is $37.00, and 16 mm is $51.20. { "@context": "https://schema.org", "@type": "Product", "name": "Globe Scientific Flange Plug Caps, Red Polyethylene, 12/13/16 mm", "brand": { "@type": "Brand", "name": "Globe Scientific" }, "description": "Red polyethylene flange plug caps for 12, 13, and 16 mm test tubes. Push-in closures sold 1000 per case.", "material": "Polyethylene", "color": "Red", "offers": { "@type": "AggregateOffer", "priceCurrency": "USD", "lowPrice": "36.70", "highPrice": "51.20", "offerCount": "3", "offers": [ { "@type": "Offer", "sku": "118127R", "name": "Flange Plug Cap 12 mm Red", "price": "36.70", "priceCurrency": "USD" }, { "@type": "Offer", "sku": "118240R", "name": "Flange Plug Cap 13 mm Red", "price": "37.00", "priceCurrency": "USD" }, { "@type": "Offer", "sku": "116152R", "name": "Flange Plug Cap 16 mm Red", "price": "51.20", "priceCurrency": "USD" } ] } } { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Which tube diameter does each cap fit?", "acceptedAnswer": { "@type": "Answer", "text": "Each variant is sized to the tube inner diameter: 12 mm, 13 mm, or 16 mm. Match the cap size to your tube's bore for a snug flange plug seal; confirm tube ID against the manufacturer's spec before ordering." } }, { "@type": "Question", "name": "Are these caps sterile?", "acceptedAnswer": { "@type": "Answer", "text": "No. The flange plug caps are supplied non-sterile. If your workflow requires sterility, validate an in-house autoclave or chemical sterilization step against polyethylene's temperature limits before use." } }, { "@type": "Question", "name": "What material are the caps made from?", "acceptedAnswer": { "@type": "Answer", "text": "They are molded from polyethylene, a flexible plastic that provides a friction-fit closure and tolerates standard refrigerated and ambient storage. Polyethylene is not recommended for autoclave cycles at elevated temperatures." } }, { "@type": "Question", "name": "How many caps come in a case?", "acceptedAnswer": { "@type": "Answer", "text": "Prices are per case of 1000 caps. The 12 mm case is $36.70, 13 mm is $37.00, and 16 mm is $51.20." } } ] }
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