Test Tube Caps

These autoclavable caps are designed to ensure the ultimate in product safety. The liners are white styrene-butadiene faced with Teflon.

These caps are designed specifically for use on our popular line of multi-purpose sample cups and are produced from polyethylene (PE). The caps are available with a solid or cross-cut pierceable top and they snap securely in place on each of the sample cups.

Prevent leakage under demanding conditions. Thermo Scientific™ Screw Cap Microcentrifuge Tube Caps feature o-rings to form a secure seal. Optimized for secure short term storage in low temperatures, these autoclavable screw caps are available in a variety of colors, and adapt to your...

These snap caps are designed specifically for use on flared-top urine centrifuge tubes. The cap snaps snugly onto Globe Scientific urine centrifuge tubes (Thomas Nos. 1202L37, 1202L35 and 1202L42) and provides a great leak-resistant seal.

Available in multiple colors and package sizes. Ensure reliable and secure sealing for your 9mm screwthread autosampler vials with these high-quality vial caps. Featuring ETFE/Silicone Septa, the caps offer excellent chemical resistance and prevent sample contamination. The caps' robust construction...

18-400 CAP, PP WHT, FMD PE LNR

Biodegradable Plastic Cylinder Mold Lids are purchased separately to fit Gilson Biodegradable Plastic Cylinder Molds. Slight dome shape with internal ridge snaps tightly over lip of molds. Use of tight-fitting lids assures positive moisture retention.

Designed to work in Shimadzu and Waters WISP™ 48 position autosamplers. 4.0mL Amber Vial Black Closure, Red PTFE/Silicone Septa, 0.065"

MicroLiter Certified ULTRAPure Septa caps ultra-low bleed silicone inserts friction fit into 9 mm natural polypropylene caps are available in non-silted and silted versions. Ultra-low bleed blue/ teal silicone Shore A is laminated to white PTFE film, 1 mm thick. Note: pictured on vial, but not...

Ideal for a wide range of laboratory applications, this white, polypropylene cap is designed to securely fit 22-400 bottles. The cap's construction incorporates a PTFE/FMD PE lining, ensuring exceptional chemical resistance and durability, thereby safeguarding your valuable samples and solutions....

GL 45 screw cap with either two or three ports that have GL 14 thread. This is a flexible modular system which has four different hose diameters available: 1.6 mm, 3.0 mm, 3.2 mm and 6.0 mm that can be connected.Sterile pressure equalization is possible through use of membrane filter. Legal...

Pre-flared, shallow, thin-walled aluminum cap for reinforcing XRF pellets. Commonly used in the production of pressed power sample disks for XRF but also used for OES and other analytical techniques. Forms the bottom and sides of the finished pellet. 31 mm wide x 8 mm deep. Produces pellets 31 mm x...

FlowLinX conical tube caps are ideal for use with conical sampling tubes for aseptic fluid sampling applications used in cell culture, fermentation, chromatography, sterile bulk and transfer.  The caps are available in 50mL and 15mL size with 1/8" hose barbs

13-425.20-400 CONNECTION, BLK PHEN

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: Black Case Quantity:...

These caps, made of polypropylene, are ideal for use with volatile solvents, sensitive compounds, and biological media. The SURE-LINK process welds each cap with a Polypropylene/PTFE/Silicone liner bonded to the cap. This process allows the cap to maintain seal through multiple autoclaving...

Replacement closed-top polypropylene closures and PTFE liners are sold separately and unassembled except for 1709B73, which is a 24-414 size that comes with a bonded-in PTFE-lined silicone liner.

For use with 25mm Culture Tubes or 32mm Sidearms. Silicone Sponge Plugs are the ideal replacement for cotton plugs when working with aerobic cultures. They cut losses due to evaporation in half in comparison to cotton plugs, thus minimizing changes in pH values. They can be dry heat sterilized...

Semi-Automated Handheld Screw Cap Decapper, 8-channel provides users with a flexible solution for capping and decapping 96 format screw caps for low-to-mid throughput environments, with easily interchangeable cartridges to switch between tube types. The 8-channel hand-held capper and de-capper...

Ensure your scientific samples maintain their integrity with this Septa, Flat, PTFE Faced. Made of durable materials, it provides a secure seal to prevent leaks and contamination, thereby enhancing the overall efficiency of your experiments. The PTFE facing adds a chemically inert and heat-resistant...

Enables Sarstedt tubes to be capped and decapped with the AlteCap Solo decapper. 

Full specifications Clear Glass Closed Top Screw, Level 2 White Polyethylene Foam/White PTFE