Test Tube Caps

20-400 CAP, PP YLW, OPN, UNLINED

MicroLiter® BlueMAG™ caps uniquely designed for automated GC, GC-MS and LC-MS chromatography magnetic sample transport systems. A perfect fit for headspace sampling techniques to 130°C. Offering an innovative built-in steel overlay on the outside of the polypropylene screw closure. The...

White Unlined Polypropylene Caps are known for good impact strength, cost effectiveness, and pliability. Unlined polypropylene closures are also available in black. These caps are autoclavable and are suitable for many dry products.

Pre-assembled closure and septa minimize contamination from handling. Offering reliable sealing solutions for laboratory bottles, the GPI 8-425, Preassembled Closures and Septa ensures secure containment of substances. Preassembled for convenience, these closures minimize the potential for...

Use Thermo Scientific™ SureSTART™ 18 mm Precision Screw Caps with screw vials that have an 18 mm opening, including our SureSTART 10 mL and 20 mL Screw Top Headspace Vials (Level 3). Select Level 3 products for ultimate performance and sensitivity from your...

Black phenolic screw cap Poly-Seal liner is manufactured from low density polyethylene Unique cone liner design offers superior torque retention and excellent sealing characteristics It is recommended that liner be tested prior to use for leak resistant applications

20-410 STARLINE CAP, PP WHT

Efficiently seal your laboratory bottles with this durable 38-400 cap. Constructed from high-quality polypropylene, it offers excellent resistance to a wide range of solvents and other chemicals, ensuring the integrity of your samples. The cap features a TFE liner, providing a superior barrier and...

Manufactured from red PTFE silicone. Ideal for screw thread vials. Specifications: Autoclavable Material: Ptfe Silicone Size: 9mm Septa Thickness: 0.040" Case Quantity: 1000

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. Features Makes sample disks easier to remove from the pellet...

Orange Caps fit empty 2mL FastPrep Tubes and are used in Fastprep systems to hold sample for Homogenization. Available separately for those who wish to fill their own Lysing Matrix Tubes. Colored screw cap with o-ring.

Crafted from durable polypropylene, this white cap is designed to fit securely on 22-400 bottles, ensuring a tight seal and reducing the risk of leakage or contamination. The foam liner, composed of polyethylene, adds an additional layer of protection, making it an ideal choice for storing and...

Nalgene™ HDPE Tamper Evident Closures are specially designed for use with PET/PETG square media bottles. Available in 38-430 finish Natural HDPE closures are ADFC (Animal Derived Component-Free) Fits Nalgene PET and PETG Media Bottles with 38-430 neck finish (except 125mL PETG Media Bottles)...

Our PTFE NMR/EPR Tube Caps are machined to exact specifications with smaller gyroradius and more homogeneous mass distribution than disposable caps providing better spinning stability. They are recommended for experiments at high - ultra high field and those using Chloroform as the reference...

Manufactured from red PTFE silicone. Ideal for screw thread vials. Specifications: Autoclavable Material: Ptfe Silicone Size: 10mm Septa Thickness: 0.060" Case Quantity: 1000

The Corning® orange polypropylene caps are autoclavable at 121°C, have a GLS80 thread and use a linerless plug seal design for efficient sealing. Cap Style: Plug Seal Cap Material: Polypropylene Cap Color: Orange Thread Finish: 80 GL Feature: Reusable Sterile: No

MicroLiter 20mm crimp top seals are available in multiple colors and septa types.

MicroLiter's 11mm AlumiTin crimp-top autosampler vial seals are available in multiple colors and septa types.

28-410 STARLINE CAP, PP NAT

Pre-assembled Open Top Caps 100/Case

Six styles of caps to choose from and two sealing types: O-ring seal and lip seal The cap is molded with a deep internal lip that fits snugly against the interior wall of the tube thus preventing the contents from coming in contact with the seal or threads, thereby reducing the chances of sample...

These standard 18-410 G.P.I. thread screw caps are replacement caps for the No. 5650 PYREX® volumetric flasks. Caps have a durable cone-shaped polyethylene liner Poly-seal cap insures a leak-resistant closure and no contamination when working with most common reagents