Test Tube Caps

The BiMetal Seal is comprised of tin and aluminum materials. The outer surface (red or blue) is aluminum and the inner diameter is a silver tin.

Enable rapid identification by using Thermo Scientific™ Nalgene™ HDPE High Profile Closures with Color Coders for Micro Packaging Vials. Closures have no O-ring to fall out or contaminate contents and are free of toxic heavy metals. Permanently attached color coded inserts do not come in...

Open Top Screw Cap Only 15mm Specifications: Size:15mm Material: Black Phenolic Thread Finish: 15-425 Packed 250 Per Case

Made of Polypropylene T504AQX screw cap incorporates a pierceable septum made of chemically resistant PTFE on the outside and silicone on the inside, both components being stable over a broad range of temperatures. The septum also acts as a silicone O-ring for better sample protection. It is...

Ideal for a variety of laboratory applications, the 13-425 cap is constructed from durable polypropylene, ensuring longevity and resistance to chemical degradation. Its white hue allows for quick visual identification in busy workspaces. The cap comes equipped with a PTFE/FMD PE liner, offering...

As it burns, tin releases heat, causing the sample to break down more quickly and more completely. Tin capsules are routinely used to analyze polymers, soils, coal, dry dairy products, plant leaves, paper, textiles, calibration standards, and many organic and pharmaceutical products. To use, simply...

38-430 STARLINE CAP, PP WHT

89-400 CAP, PP WHT, FMD PE LNR

Closed top, linerless screw thread caps. Made of Polypropylene Economical, one-piece construction Unique design provides exceptional sealing properties Color: Natural GPI finish: 15-415 Autoclavable

Color Coded - natural, red, green, yellow and blue Enhance your laboratory's efficiency and organization with our high-quality, autoclavable culture tube closures. Manufactured by DWK Life Sciences, these polypropylene closures are specifically designed to provide a secure fit, ensuring the...

PP SturdeeSeal® PE Foam Lined Caps are known for good impact strength, cost effectiveness, and pliability. These polypropylene closures with foamed polyethylene liners have excellent sealing characteristics and offer good chemical resistance including acids, alcohols, alkalis, aqueous products,...

These blue PYREX® polyethylene caps provide an economical closure for some volumetric flasks (See Nos. 5580, 5581 and 5600).

For radiation-sterilization applications Use with NALGENE bottles Not autoclavable

More convenient, consistent, and safer sealing process compared to crimping (better reproducibility) No risk of inaccurate or inconsistent crimping results 1.5 mm thick septa are easier to penetrate than crimp closures N 20 with 3 mm thick septa generating less particles during sample pick up...

Globe Scientific CT™ flange plug caps have extremely high tolerances and are specifically designed for use with CapTrack™. These caps provide superior leak resistance in all tubes processed by CapTrack™ which allows for the utmost confidence in sample integrity during handling and...

Made of polyethylene Plug type push-in caps and 2-position snap caps are made of polyethylene for test tubes with outside diameters of 12 or 17 mm. Dual position caps offer two possibilities: the closed but unsealed position where samples are maintained aerobic for microbiological procedures; and...

Globe Scientific’s line of DiamondPure™ cost-effective chromatography vials is designed to deliver consistent performance across HPLC and GC workflows. Manufactured from Type I borosilicate glass and available in clear or amber, each 2mL vial pairs with a matching DiamondPure™ cap...

Secure your bottle contents with unparalleled efficacy using our premium Closure 13-415 from DWK Life Sciences. Expertly designed to fit bottles with a 13-415 neck finish, this cap ensures a tight, leak-proof seal for optimum content preservation and minimal risk of contamination. It is an...