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Rubber Stoppers & Corks


Use these sturdy rubber stoppers and lab-grade corks to contain liquids in test tubes and flasks. They fit tightly to prevent chemical leaks. Our 5 mm glass tubing fits in the one- or two-hole rubber stoppers. For small test tubes use #00 stoppers. Use #0 for large test tubes, and #1 for extra large. Use #6 stoppers for 250 ml flasks. Use a cork borer to drill holes in the corks. Sizes 00-14.

Save when you buy 10 or more of one of these stoppers!

 
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Rubber stopper, #00, 1-hole
Rubber stopper, #00, 1-hole

Rubber stopper, #00, 2-hole
Rubber stopper, #00, 2-hole

Rubber stopper, #00, solid
Rubber stopper, #00, solid

Corks, No. 14, 5 pack
Corks, No. 14, 5 pack

$0.80
These #00 rubber stoppers are 10-15 mm diameter with one 3mm diameter hole.... more

$0.80
These #00 rubber stoppers are 10-15 mm diameter with two 3mm diameter holes... more

$0.80
These #00 rubber stoppers are 10-15 mm diameter. #00 rubber stoppers fit sm... more

$2.50
These No. 14 lab-grade corks fit our 250 ml flasks and most 500 ml flasks.
Corks, No. 4, 10 pack
Corks, No. 4, 10 pack

Rubber stopper, #0, 1-hole
Rubber stopper, #0, 1-hole

Rubber stopper, #0, 2-hole
Rubber stopper, #0, 2-hole

Rubber stopper, #0, solid
Rubber stopper, #0, solid

$1.50
These No. 4 lab-grade corks fit our large 16 mm x 150 mm test tubes.

$0.35
These #0 rubber stoppers are 13-17 mm diameter with one 3 mm diameter hole.... more

$0.35
These #0 rubber stoppers are 13-17 mm diameter with two 3 mm diameter holes... more

$0.35
These #0 rubber stoppers are 13-17 mm diameter. #0 rubber stoppers fit larg... more
Rubber stopper, #1, 1-hole
Rubber stopper, #1, 1-hole

Rubber stopper, #1, 2-hole
Rubber stopper, #1, 2-hole

Rubber stopper, #1, solid
Rubber stopper, #1, solid

Cork Borer, 5 mm
Cork Borer, 5 mm

$0.35
These #1 rubber stoppers are 14-19 mm diameter with one 5mm diameter hole. ... more

$0.35
These #1 rubber stoppers are 14-19 mm diameter with two 4mm diameter holes.... more

$0.35
These #1 rubber stoppers are 14-19 mm diameter. #1 rubber stoppers fit 50ml... more

$2.50
This core borer is used to make uniform 5 mm (3/16") diameter holes in rubb... more
 
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