Lab Stoppers

Sleeve stopper septa are manufactured from pure natural rubber for excellent resealability when used for cannulation techniques or from FKM rubber for high chemical resistance. Natural rubber septa are available in red and white colors and a soft rubber formulation that contains no fillers or...

1 pound pack of assorted solid rubber stoppers. Sizes and quantities are as follows: Size 00: 4 each Size 0: 4 each Size 1: 4 each Size 2: 3 each Size 3: 3 each Size 4: 3 each Size 5: 3 each Size 6: 3 each Size 7: 3 each

These blue and white No. 13 PYREX® stoppers are made from linear high-density polyethylene and have closed bottoms to conform to Standard Taper stopper dimensions. The three rings on the plug provide an efficient seal. This improved design fully protects the neck in the event of accidental...

Medium length standard taper stoppers, size 7/15, 10/18 and 12/18 are solid, all others are hollow.

30 MM STOPPER, SNAP-ON (16X30) GRY BTYL

These high quality gray chlorobutyl stoppers are used for research and pharmaceutical packaging applications. Universal gray chlorobutyl formulation passes Japanese, European and United States pharmacopeia testing for globally marketed pharmaceutical products Formulation contains no plasticizers,...

Engineered for a "push on" fit in NMR tubes and ampules. The unique design provides a penetration point for cannulation and a dual seal inside the tube and on the outer sleeve. Will not break delicate, thin-wall tubing. Manufactured from one certified raw material formulation for absolute...

The recommended choice for use with organic chemicals and solvents, pressure applications, and cannulation techniques:Precision Seal septa are designed specifically for the rigorous requirements of chemical applications. •Precision fit: Precision Seal septa have a longer, tapered plug that seats...

Similar to CG-3026 and CG-3027 except with two holes. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications...

•This narrow ring seal is an alternative to a PTFE joint sleeve •Greaseless protection for air- and moisture- sensitive compounds •Can be used for prolonged storage under vacuum •Slide easily onto medium and full length taper joints •Can be used with Keck® clip and similar metal joint clips...

Sani-Tech® ultra-pure platinum-cured silicone stoppers outperform standard neoprene and rubber stoppers in critical laboratory and process applications. These long-life silicone stoppers are fully autoclavable and sterilizable and will not crack, spallate or invoke particle migrations that can...

Stoppers are used with laboratory glassware such as flasks and separatory funnels. PTFE has excellent chemical resistance and resists freezing in ground glass joints Remove the colored polyethylene handle from the PTFE stopper before cleaning or exposing to temperatures above 80 °C Stoppers of...

Yellow and blue closed-bottom linear high-density polyethylene stopper to fit in the ground glass neck Enlarged flange on stopper is designed to protect the glass if tipped over Size: 13 Case of 6

Ensure a secure and tight seal for your laboratory containers with the Pluro-Stopper Set. These stoppers, designed for optimal performance, provide an excellent solution for preventing leakage of gases or liquids during experiments. The set includes a variety of sizes, making it adaptable to a wide...

The PTFE hollow stopper is an essential accessory for sealing laboratory glassware, providing an airtight closure. Its hollow design allows for easy insertion and removal, while the PTFE material ensures chemical inertness and high thermal tolerance. This stopper is ideal for applications requiring...

PTFE Stopper, Standard Taper, Synthware, Various Joint Sizes Available, with handle for easy griping.

Plug-style needle closures White Polyethylene Designed for shell vials Economical

PTFE stopper has a Polypropylene extraction nut permitting easy removal of the stopper from the glass outer joint. The 14/20 and 19/22 are solid, while the larger sizes are hollow.

Well-known as the best quality rubber turn-over closure with serrated stopper, Suba-Seal brand is available exclusively from Sigma-Aldrich. Ideal for air and moisture-sensitive chemistry procedures. After piercing with non-coring needle, rubber closes puncture, providing air and moisture tight seal...

Well-known as the best quality rubber turn-over closure with serrated stopper, Suba-Seal brand is available exclusively from Sigma-Aldrich. Ideal for air and moisture-sensitive chemistry procedures. After piercing with non-coring needle, rubber closes puncture, providing air and moisture tight seal...

Hollow, hexagonal head, Standard Taper stopper May be set on the flattened top to avoid contamination of the ground surface Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements

Well-known as the best quality rubber turn-over closure with serrated stopper, Suba-Seal brand is available exclusively from Sigma-Aldrich. Ideal for air and moisture-sensitive chemistry procedures. After piercing with non-coring needle, rubber closes puncture, providing air and moisture tight seal...

Designed by Chemglass, these PTFE Stoppers offer reliable performance in the most demanding laboratory environments. Characterized by their high chemical resistance and temperature tolerance, these stoppers are ideal for sealing a variety of laboratory containers. The non-reactive nature of PTFE...

The Tan PE Stopper from Jensen Global is crafted to provide a secure seal for various containers, preventing leaks and ensuring content preservation. Made from durable polyethylene, it offers chemical resistance and longevity. This stopper is ideal for laboratory and industrial applications where...