Rubber Stoppers

RubberMill produces rubber stoppers for the lab, commercial, medical, food and beverage, and industrial markets. Our standard grade stoppers are manufactured from a premium grade SBR black rubber compound. The 40 ± 5 durometer material is soft, pliable and long lasting. Solid, one-hole and two-hole stoppers are stocked for immediate shipment.

Please select from the following options and click for more information on our standard lab stopper sizes.

 
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Lab Stopper Material Specifications

Solid Stoppers
One Hole Stoppers
Two Hole Stoppers

Rubber Stoppers

Lab Stopper Material Specifications
Compound SBR
Item No. Item Name Style Stopper Size Specific Gravity
CLS-000-S-10B40 #000 Size Solid Lab Stopper Solid #000 1.342
CLS-000-1H-10B40 #000 Size 1-Hole Lab Stopper 1-Hole #000 1.342
CLS-000-2H-10B40 #000 Size 2-Hole Lab Stopper 2-Hole #000 1.342
CLS-00-1H-10B40 #00 Size 1-Hole Lab Stopper 1-Hole #00 1.342
CLS-00-2H-10B40 #00 Size 2-Hole Lab Stopper 2-Hole #00 1.342
CLS-00-S-10B40 #00 Size Solid Lab Stopper Solid #00 1.342
CLS-0-S-10B40 #0 Size Solid Lab Stopper Solid #0 1.342
CLS-0-1H-10B40 #0 Size 1-Hole Lab Stopper 1-Hole #0 1.342
CLS-0-2H-10B40 #0 Size 2-Hole Lab Stopper 2-Hole #0 1.342
CLS-01-1H-10B40 #1 Size 1-Hole Lab Stopper 1-Hole #1 1.342
CLS-01-2H-10B40 #1 Size 2-Hole Lab Stopper 2-Hole #1 1.342
CLS-01-S-10B40 #1 Size Solid Lab Stopper Solid #1 1.342
CLS-02-1H-10B40 #2 Size 1-Hole Lab Stopper 1-Hole #2 1.342
CLS-02-2H-10B40 #2 Size 2-Hole Lab Stopper 2-Hole #2 1.342
CLS-02-S-10B40 #2 Size Solid Lab Stopper Solid #2 1.342
CLS-03-1H-10B40 #3 Size 1-Hole Lab Stopper 1-Hole #3 1.342
CLS-03-2H-10B40 #3 Size 2-Hole Lab Stopper 2-Hole #3 1.342
CLS-03-S-10B40 #3 Size Solid Lab Stopper Solid #3 1.342
CLS-04-1H-10B40 #4 Size 1-Hole Lab Stopper 1-Hole #4 1.342
CLS-04-2H-10B40 #4 Size 2-Hole Lab Stopper 2-Hole #4 1.342
CLS-04-S-10B40 #4 Size Solid Lab Stopper Solid #4 1.342
CLS-05-1H-10B40 #5 Size 1-Hole Lab Stopper 1-Hole #5 1.342
CLS-05-2H-10B40 #5 Size 2-Hole Lab Stopper 2-Hole #5 1.342
CLS-05-S-10B40 #5 Size Solid Lab Stopper Solid #5 1.342
CLS-05.5-1H-10B40 #5-1/2 Size 1-Hole Lab Stopper 1-Hole #5-1/2 1.342
CLS-05.5-2H-10B40 #5-1/2 Size 2-Hole Lab Stopper 2-Hole #5-1/2 1.342
CLS-05.5-S-10B40 #5-1/2 Size Solid Lab Stopper Solid #5-1/2 1.342
CLS-06-1H-10B40 #6 Size 1-Hole Lab Stopper 1-Hole #6 1.342
CLS-06-2H-10B40 #6 Size 2-Hole Lab Stopper 2-Hole #6 1.342
CLS-06-S-10B40 #6 Size Solid Lab Stopper Solid #6 1.342
CLS-06.5-1H-10B40 #6-1/2 Size 1-Hole Lab Stopper 1-Hole #6-1/2 1.342
CLS-06.5-2H-10B40 #6-1/2 Size 2-Hole Lab Stopper 2-Hole #6-1/2 1.342
CLS-06.5-S-10B40 #6-1/2 Size Solid Lab Stopper Solid #6-1/2 1.342
CLS-07-1H-10B40 #7 Size 1-Hole Lab Stopper 1-Hole #7 1.342
CLS-07-2H-10B40 #7 Size 2-Hole Lab Stopper 2-Hole #7 1.342
CLS-07-S-10B40 #7 Size Solid Lab Stopper Solid #7 1.342
CLS-07.5-1H-10B40 #7-1/2 Size 1-Hole Lab Stopper 1-Hole #7-1/2 1.342
CLS-07.5-2H-10B40 #7-1/2 Size 2-Hole Lab Stopper 2-Hole #7-1/2 1.342
CLS-07.5-S-10B40 #7-1/2 Size Solid Lab Stopper Solid #7-1/2 1.342
CLS-08-1H-10B40 #8 Size 1-Hole Lab Stopper 1-Hole #8 1.342
CLS-08-2H-10B40 #8 Size 2-Hole Lab Stopper 2-Hole #8 1.342
CLS-08-S-10B40 #8 Size Solid Lab Stopper Solid #8 1.342
CLS-08.5-1H-10B40 #8-1/2 Size 1-Hole Lab Stopper 1-Hole #8-1/2 1.342
CLS-08.5-2H-10B40 #8-1/2 Size 2-Hole Lab Stopper 2-Hole #8-1/2 1.342
CLS-08.5-S-10B40 #8-1/2 Size Solid Lab Stopper Solid #8-1/2 1.342
CLS-09-1H-10B40 #9 Size 1-Hole Lab Stopper 1-Hole #9 1.342
CLS-09-2H-10B40 #9 Size 2-Hole Lab Stopper 2-Hole #9 1.342
CLS-09-S-10B40 #9 Size Solid Lab Stopper Solid #9 1.342
CLS-09.5-1H-10B40 #9-1/2 Size 1-Hole Lab Stopper 1-Hole #9-1/2 1.342
CLS-09.5-2H-10B40 #9-1/2 Size 2-Hole Lab Stopper 2-Hole #9-1/2 1.342
CLS-09.5-S-10B40 #9-1/2 Size Solid Lab Stopper Solid #9-1/2 1.342
CLS-10-1H-10B40 #10 Size 1-Hole Lab Stopper 1-Hole #10 1.342
CLS-10-S-10B40 #10 Size Solid Lab Stopper Solid #10 1.342
CLS-10.5-1H-10B40 #10-1/2 Size 1-Hole Lab Stopper 1-Hole #10-1/2 1.342
CLS-10.5-S-10B40 #10-1/2 Size Solid Lab Stopper Solid #10-1/2 1.342
CLS-11-1H-10B40 #11 Size 1-Hole Lab Stopper 1-Hole #11 1.342
CLS-11-S-10B40 #11 Size Solid Lab Stopper Solid #11 1.342
CLS-11.5-1H-10B40 #11-1/2 Size 1-Hole Lab Stopper 1-Hole #11-1/2 1.342
CLS-11.5-S-10B40 11-1/2 Size Solid Lab Stopper Solid #11-1/2 1.342
CLS-12-1H-10B40 #12 Size 1-Hole Lab Stopper 1-Hole #12 1.342
CLS-12-S-10B40 #12 Size Solid Lab Stopper Solid #12 1.342
CLS-13-1H-10B40 #13 Size 1-Hole Lab Stopper 1-Hole #13 1.342
CLS-13-S-10B40 #13 Size Solid Lab Stopper Solid #13 1.342
CLS-13.5-1H-10B40 #13-1/2 Size 1-Hole Lab Stopper 1-Hole #13-1/2 1.342
CLS-13.5-S-10B40 #13-1/2 Size Solid Lab Stopper Solid #13-1/2 1.342
CLS-14-1H-10B40 #14 Size 1-Hole Lab Stopper 1-Hole #14 1.342
CLS-14-S-10B40 #14 Size Solid Lab Stopper Solid #14 1.342
CLS-15-1H-10B40 #15 Size 1-Hole Lab Stopper 1-Hole #15 1.342
CLS-15-S-10B40 #15 Size Solid Lab Stopper Solid #15 1.342
CLS-16-1H-10B40 #16 Size 1-Hole Lab Stopper 1-Hole #16 1.342
CLS-16-S-10B40 #16 Size Solid Lab Stopper Solid #16 1.342

In addition to our standard stocked items, we manufacture custom stoppers in all durometers and compounds. Visit our Technical Data Section to learn more about different rubber compounds, durometer, and chemical resistance properties.

Tapered rubber stoppers are the most common configuration, but we can provide any shape plug, bung, or stopper you need for labware, bottles, boiler tubes, flasks, jars, test tubes or similar containers. Contact us to discuss your unique stopper needs.