Test Tube Caps

Thermoset Urea closures are known for providing the widest range of chemical compatibility and for being the most temperature tolerant of plastic closures. Thermosetting plastics (thermosets) such as urea resins are polymers that irreversibly cure; thus urea caps and closures cannot be remelted...

38-430 STARLINE CAP, PP RED

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: 13mm Case Quantity: 1000 Color:...

Open top polypropylene screw caps supplied with PTFE faced silicone septa. Supplied in packages of 144.

Enhance the security and efficiency of your laboratory tasks with this top-tier phenolic screw cap, specially designed by MilliporeSigma. Featuring an open center, it provides a perfect fit for a variety of dispensing equipment or probes, maintaining the substance's integrity by eliminating the need...

Tip made of LDPE (Low Density Polyethylene) Extended controlled dropper tip dispenses one drop at a time Average drop size is 44uL

20-400 CAP, PP WHT, OPN, UNLINED

Closures for 9mm, 18mm, and 20mm vials. Choose from steel, aluminum, or polypropylene closures lined with PTFE / silicone.

White urea PTFE-faced foam-backed rubber liner Ideal for use with scintillation vials

Polyethylene caps are designed to fit all types of round, conical and standard bottom serum cups. Available in flat top and perforated top.  Non-perforated caps are appropriate for short-term storage and perforated caps help minimize variation caused by evaporation during processing. ...

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