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…

With a patented Glas-Col Snorkel Stopper, you'll never again have to take time to open the stopcock and relieve pressure when vigorously shaking a separatory funnel, because our Snorkel Stopper does the task automatically. If you use a Glas-Col shaker, you can simply load the funnels onto it…

Replacement part for items that are ground to stopper dimensions. Yellow and blue stopper has a closed bottom. The enlarged flange is designed to protect the neck if the glass object is tipped over.

Penny-Head Stopper, Flask Length, Synthware, Various Joint Sizes Available.

Convenient assortments of various sizes of rubber stoppers in 1lb bags.

Free from volatiles or extractable substances which may impair cell growth; for use at temperatures from -80 to 450°F Can be steam sterilized at 15 lbs. pressure, making them suitable for culture tubes containing pathogenic materials Length: 25 mm Not recommended for use with…

Hollow stopper with closed bottom

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…

Uses include outgassing NMR tubes, pressure venting or adding reactants via syringe. Hollow, plug-type stopper fits into the neck of the glassware apparatus Sleeve extension fits over the neck for a secure seal Diaphragm can be punctured with a syringe needle Series 774261 may be…

Charlie Plugs are breathable drosophila plugs made from recycled polyester. Polyester is stronger, more breathable and offers excellent mite prevention than cellulose acetate plugs. Charlie plugs leave no clinging fibres they do not retain moisture and are completely made in the USA from recycled…

Similar to 8771R10 series, but in standard taper joint sizes Conforms to ASTM Standard E 675 Use with boiling and distilling flasks

Test tube with interchangeable stopper; 24/40 stopper is hollow, other two solid.

Hollow PTFE stopper.

RS-2H-C 1 pound package of assorted 2 hole rubber stoppers. Sizes and quantities are as follows: Size 2: 3 each Size 3: 3 each Size 4: 3 each Size 5: 3 each Size 6: 3 each Size 7: 3 each Size 8: 3 each

Septa for 20 mm screw caps or seals. Made of Polytetrafluoroethylene /Silicone Autoclavable

Stopcock plug with 1:5 PTFE metering valve.

13.5 Rubber Stopper Similar to CG-3026 except with one hole. 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…

Solid stopper with closed bottom.

Hollow plug to fit inside bottles, flasks, vials, or tubing with a sleeve to pull over neck to create a double seal .Septa area allows insertion of needle, with excellent re-sealing properties for air sensitive chemistry Standard Compounds include Red and White Natural Rubber, Gray Butyl on…

These PYREX® gas washing Standard Taper stoppers are replacements for the 500mL gas washing bottles (No. 31760-500EC). Sidearm tubulations are 8mm O.D. A 40/50 Standard Taper stopper is used to seal the top to the base. This Standard Taper stopper incorporates a tube with a 20mm diameter extra…

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…

Manufactured from Blue Chlorobutyl. The septum stopper can withstand autoclaving 160 degree Celsius at normal autoclaving times 12-20 minutes. Specifications: Material: Blue Chlorbutyl Autoclaving: No Higher Than 160 Degree Celsius Size: 20mm Case Quantity: 100  

A small, low holdup automatic head which can be completely disassembled for easy cleaning or replacement of parts. Lower column joint and side arm for condenser are 24/40. Joint on takeoff arm is 28/11. The plunger guide is 19/38 and the 10/30 thermometer joint may be used with our 8314 product…

PTFE Stopper, Standard Taper, Extraction, Synthware, Various Joint Sizes Available, Stopper has a Nylon extraction nut permitting easy removal of the stopper from the glass outer joint.

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…

Full length glass stoppers available in a variety of joint sizes. Joint sizes 7/25 and 10/30 are solid glass, others sizes are hollow glass.

Full length glass standard taper stoppers with hook.

•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 …