Test Tube Caps

Synonyms: caps bottles; glass bottles caps Legal Information: DURAN is a registered trademark of DWK Life Sciences

White polypropylene closure, PTFE lined. For  Boston Round Glass Bottles,  See  1204X96 -  1204Y17

safePort™ Low Profile O-ring Caps fit safePort™ 0.5, 1.5, and 2.0ml screw cap vials. Screw caps deliver leak-proof seal for all types of contents, ideal for life science reagent or solution. Caps and vials sold and packaged separately allow for customization on coloring and sizes desired...

Dropper Assemblies feature a glass tube with black polypropylene closure and rubber squeeze bulb. Tip opening has a 3.0mm outside diameter.

Overfitting caps for use with sterile culture tubes have two positions: loose for aerobic culturing and tight for anaerobic cultureing and leakproof sealing.  Designed to fit specified tube material and size, listed in description.  Available in non-sterile or sterile.

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. As for tubes, these closures are also made of polypropylene, providing the same coefficient of expansion for both, which further...

The Finneran 24 mm septa is mainly used with screw thread closures for tight sealing of the stored sample. It is mainly used in research laboratories or in chemical industries. This septa is made of sturdy PTFE/silicone material which ensures long lasting usage and durability.

Made of polyethylene An economical way to recap blood drawing tubes, disposable glass test tubes and plastic culture tubes. Flexible VACUCAP™ closures protect from aerosols of highly infectious microorganisms. They guard samples against cross-contamination and laboratory work areas against...

Bonded and ready assembled open top black screw closures 10-425 and plain caps with no liner Closures available with a broad variety of septa materials Red Rubber / FEP septum for routine analyses; for more demanding analyses: high purity silicone / PTFE septa Slit silicone/PTFE septa as a...

15-425 CAP, PHEN BLK, POLY-SEAL PE CONE

Stem & Draw Tube Closure Applicable with Nalge # 2401-0125 & 2401-0250

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: 9mm Case Quantity: 1000 Color:...

Screw cap made of radiation grade polypropylene Variety of colors Packaged in case of 100 or 1000

AlteCap™ Solo Single Screw Cap Handling Quickly cap, decap or recap single tubes Flexible – easy to use, intuitive touch button controls. Light and portable Functionality – recap tubes or dicard used caps. Apply fresh caps from a cap carrier Stand included – convenient for...

Snap Caps are designed for KIMAX volumetric flasks Yellow polyethylene Caps may not be usable with items lacking necks specially tooled to proper diameters and contours Fits 1000mL volumetric flasks

Excellent for general laboratory use Specially formulated phenolic resin and liner adhesive to withstand the effects of repeated autoclaving PTFE-faced/general purpose white rubber liners are highly resistant to chemical effects Identified in ASTM Specification E982, Class A requirements

Available in multiple colors and package sizes.

Closure size: 70mm; vacuum limit: 5in (127mm) Hg; pressure limit: 2 psig (0.137 bar) Fluid transfer closure is composed of polypropylene and is made for fluid transfer in the lab or field Autoclavable closure fits Nalgene® Mason jars or 125mL and 250mL straight-sided jars with 70mm closures Top...

24-410 STARLINE CAP, PP RED

15-425 CAP, PP WHT, PTFE/FMD PE

Protect your valuable liquids with the premium insert cap from Bel-Art - SP Scienceware, designed explicitly for 43mm spout jerricans. This cap ensures a secure, leak-free environment, making it ideal for the safe transportation and storage of fluids in a laboratory or industrial setting. With its...

Ensure protection for your lab samples with these flanged plug caps from Globe Scientific. Designed to fit 12mm bottles, they provide a secure seal to prevent leakage and contamination. These durable caps are perfect for a wide range of laboratory applications, offering reliable and consistent...

Reduce probe servicing time and eliminate assembly problems using Thermo Scientific™ Orion™ Membrane Caps for Polarographic Dissolved Oxygen Probe. Convenient screw-on membrane caps help ensure optimal probe performance

Red Caps fit EMPTY 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. Use with Empty FastPrep Tubes. Add sample to empty tube, add appropriate Lysing Matrix material and lysing...