Test Tube Caps

Solid virgin PTFE liners can be manually inserted into closure and maintains a snug friction fit. PTFE liners are also available in other sizes and thicknesses.

Perfluroalkoxy (PFA) screw thread closures 20mm thread

For pharmaceuticals, specialty chemicals and food ingredients, this jar lid protects your valuable products from moisture, from contamination, and against tampering, ensuring your hazardous solids arrive safely at their destination. The quarter-turn screw lid closure reduces handling time.

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

Teflon Septum made from PTFE. Size: 14, 25, and 32mm available. Kemtech America's SYNTHWARE Teflon Septum is engineered to provide a reliable seal for bottle caps, preventing contamination and evaporation. The Teflon material ensures chemical resistance, making it suitable for a wide range of...

20-400 CAP, PP BLU, OPN, UNLINED

89-400 CAP, PP WHT, TFE LNR

Ideal for use with biological media, volatile solvents, corrosive chemicals and sensitive compounds Liner is ultrasonically welded to the cap to eliminate the possibility of glue contamination and bond failure common with autoclaving Available in convenient Lab Pack quantities as well as larger Case...

Norell™ Standard NMR Tube Caps are made of low density polyethylene, and available in 3mm and 10mm. Premium Automated NMR Tubes ...an integral component of your spectrometer™.The C-UNI-5000 series NMR tubes are specifically made for today’s automated sample changers, where tube...

Designed for standard screw thread vials. Available with or without septa. Specifications: Size: 8-425, 9-425, 10-425, 13-425 Case Quantity: 100-1000

Pre-assembled closure and septa minimize contamination from handling. Ensure the secure containment and uncompromised integrity of your chemical substances with these Preassembled GPI 13-425 Septa Caps. Designed to fit onto GPI standard threaded bottles, these caps provide an optimal seal, ensuring...

Aluminum Seal 20mm Specifications: Material: Aluminum Unlined Natural Color Fits 20mm Anaerobic Glass Tube 2048-00150 Use with Hand Crimper 2048-10020  

Bonded septa in the closure provides extra resealability. Ensure secure and clean sealing with this Preassembled R.A.M. 9mm Ribbed Screw Thread Cap that comes with a Fixed PTFE/Silicone with Slit Septa. Designed for precision and reliability, this cap offers airtight sealing to prevent contamination...

Used for snap thread vials.Caps may be snapped on and off by hand which eliminated the need for a metal crimping and decapping tool. Specifications: Size: 11mm Septa Material: Ptfe Case Quantity: 1000

Dispense just one drop at a time, with convenient, one-hand operation Captive spout cap stays in place when bottle is squeezed

Ensure a secure seal and controlled dispensation with this 28mm Closure Stem and Drawtube. Made with precision, it serves as an essential component for laboratory bottles used for storing and dispensing various substances. These components are particularly designed to withstand rigorous scientific...

Reduce the risk of contaminating contents using Thermo Scientific™ Nalgene™ PPCO High Profile Closures with Color Coders for Micro Packaging Vials. Polypropylene copolymer closures have no o-ring to fall out and contaminate content, and they are offered in a variety of colors. Features:...

MicroLiter offers products for both LC and GC applications. Ensure a secure, tight seal and mitigate the risk of contamination or leakage with these 11mm Snap Caps. Featuring Starburst PTFE/Silicone Septa, they provide a robust and reliable seal suitable for a wide range of laboratory applications....

Available in multiple colors and package sizes. Ideal for a range of scientific applications, these 9mm Screwthread Autosampler Vial Caps come equipped with FKM Fluoroelastomer Septa. They provide a reliable sealing solution, ensuring the integrity of samples during storage and transportation. The...

MicroLiter vials are cleaned and packaged in a certified Class 10000 clean room according to a designed process, developed to eliminate chromatographic errors associated with vials Critical physical dimensions are fully tested, as well as chemical clea

Available in multiple colors and package sizes. Enhance your scientific research and ensure sample integrity with the 9mm Screwthread Autosampler Vial Caps, featuring durable ETFE/Silicone Septa. These caps provide an effective seal for vials used in high-throughput, automated lab environments,...

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...

Natural molded polypropylene closures are a convenient alternative when a resealable closure is not required. The thin membrane allows for easy needle penetration and the purchase and assembly of septa are not required with this easy-to-use one-piece closure.