Test Tube Caps

Made of polypropylene Caps are available either with or without a silicone washer between the cap and the tube to ensure a positive leakproof seal at all temperatures. Closures and tubes are both manufactured of polypropylene, providing the same coefficient of expansion. The cap features a long...

Screw threads Choice of six liners

As part of the prestigious National Scientific brand, our black 11mm snap caps are expertly designed to offer convenience and security for scientific applications. Crafted for durability and reliability, these caps provide an effortless snap-on feature, ensuring easy application and removal without...

Screw Caps for use with SuperClear® microcentrifuge tubes SuperClear® Screw Cap Microcentrifuge Tubes include caps with molded-in elastomeric seal or ethylene propylene o-rings and are ideal for any sample processing application. Excellent for frozen storage or when working with hazardous or...

For use with 18mm screw necks, 13-18mm Culture Tubes, 18-25mm Culture Tubes, 38mm Culture Tubes, 25-50ml Erlenmeyer Flasks, 125-300ml Erlenmeyer Flasks, 500-1000ml Erlenmeyer Flasks, 25-125ml DeLong Flasks and 250-6000ml DeLong Flasks. Sealed-in Silic

Ensure the integrity of your samples with these sterile, double threaded caps designed specifically for 5ml sample collection tubes. Made from natural, durable material, the caps provide a secure fit, minimizing the risk of leakage or contamination. They are sold in bulk packs of 1000, with 10000...

Polyethylene test tube stopper caps are precision-molded and available in either our standard or flat-top style.  Stopper caps are available for every size of Caplugs Evergreen test tube from 8 mm to 17 mm.  Standard version is available in a wide variety of colors and flat-top version is...

Open top caps are ideal for applications requiring addition/withdrawal of vessel contents. Autoclavable to 140ºC.

Encapsulated Kit, Includes Indium and Zinc Designed for precision and reliability, the Encapsulated Kit includes both indium and zinc for a wide array of research applications. This specialized kit ensures safe handling and accurate results, making it an essential tool for professionals in various...

MicroLiter offers products for both LC and GC applications.

Ideal for a variety of laboratory applications, this white polypropylene cap is designed to provide a secure fit for a 33-400 neck size bottle. Its robust construction ensures durability and reliability for long-term use. The cap also features a foam polyethylene liner, which serves as an excellent...

MicroLiter Certified ULTRAPure Septa caps ultra-low bleed silicone inserts in 11 mm silver aluminum crimp caps are available in non-silted and silted versions. Ultra-low bleed blue/teal silicone Shore A is laminated to white PTFE film, 3 mm thick. Silver aluminum crimp caps are lacquer coated....

These polyethylene (PE) plug caps are designed in 11mm, 12mm, 16mm and 17mm sizes and are available in a selection of colors for sample identification.

Use these caps with WHEATON or other manufacturers# glass bottles or vials White polypropylene screw cap provides clear surface for writing on cap Foamed polyethylene liner provides chemical resistance for acids, alkalis, solvents, alcohols, oils, household cosmetics and aqueous products Liner...

With PTFE faced silicone liner 45mm screw thread Withstands temperatures up to 200C Autoclavable

Open top cap for use with GL screw threads. The cap combined with the CG-197 sealing ring will accommodate tubing of the listed diameter. Cap is made from PBT (thermoplastic polyester) and will withstand temperatures from -45 to 200°C.

24-410 CAP, PP WHT, FMD PE LNR

Universal plug stopper fits most 10mm, 12mm, 13mm & 16mm tubes. Produced from polyethylene (PE), the caps are available in 7 different colors.

In addition to our standard black and white caps, we now offer our VOA Vial caps in a variety of Spring colors. This is an ideal way of color coding your samples.

Azenta products are intended for sale/shipment within the US and Latin America only. All other International customers should contact their local Azenta distributor to place orders for Azenta products.

Designed for standard screw thread vials. Available with or without septa. Easy on and easy off convenience with a twist of the cap that produces an evaporation proof seal. Larger opening provides a increased target area for needle penetration. Specifications: Size: 10mm Color: Blue Case Quantity:...

The 50mm closed adapter is designed to be used with the 50mm open VersaCap. It enables the user to change the top connections creating a closed system. The adapter is molded from USP Class VI, FDA Grade material, and is autoclavable. The adapter is designed to be leakproof and comes with a...