Cork & Rubber Tapered Stoppers

Tapered cork and rubber stoppers for test tubes, flasks, plugging leaks, insect mounts.

Stoppers are used to seal glass test tubes, Erlenmeyer flasks & Florence (boiling) flasks keep out airborne contaminents.

Cork stoppers are suitable for sealing to keep materials such as cigars or spices dry and culture media sterile after autoclaving. Rubber stoppers are better if an airtight seal is required & for use with non-food chemicals . They should be washed in hot soapy water before use with food.

Please note that we can only guarantee that the rubber & cork stoppers fit our glassware properly since different supplier have different specifications & tolerances.

Check the specifications table under Technical to make sure our sizes will work with your glassware or other applications.

Description More Information Technical FAQ
Displaying 1 to 17 (of 17 products)
#2 Cork Fits ~7/16" Hole

#2 Cork Fits ~7/16" Hole
SKU: 33734-2
$0.10USD or lower Each
#5 Cork Fits ~5/8" Hole

#5 Cork Fits ~5/8" Hole
SKU: 33734-5
$0.12USD or lower Each
Cork Stopper #7

Cork Stopper #7
SKU: 33734-7
$0.14USD or lower Each
#9 Cork Fits ~7/8" Hole

#9 Cork Fits ~7/8" Hole
SKU: 33734-9
$0.30USD or lower Each
#10 Cork Fits ~7/8" Hole

#10 Cork Fits ~7/8" Hole
SKU: 33734-10
$0.42USD or lower Each
#15 Cork Fits ~1 3/16" Hole

#15 Cork Fits ~1 3/16" Hole
SKU: 33734-15
$0.80USD or lower Each
#16 Cork Fits~1 1/4" Hole

#16 Cork Fits~1 1/4" Hole
SKU: 33734-16
$0.90USD or lower Each
#17 Cork Fits ~1 5/16" Hole

#17 Cork Fits ~1 5/16" Hole
SKU: 33734-17
$1.00USD or lower Each
#18 Cork Fits ~1 3/8" Hole

#18 Cork Fits ~1 3/8" Hole
SKU: 33734-18
$1.30USD or lower Each
#19 Cork Fits ~1 7/16" Hole

#19 Cork Fits ~1 7/16" Hole
SKU: 33734-19
$1.35USD or lower Each
#24 Cork Fits ~1.75" Hole

#24 Cork Fits ~1.75" Hole
SKU: 33734-24
$3.00USD or lower Each
Rubber Stopper #00

Rubber Stopper #00
SKU: 33720-00
$0.30USD or lower Each
Rubber Stopper #1

Rubber Stopper #1
SKU: 33721
$0.40USD or lower Each
Rubber Stopper #4

Rubber Stopper #4
SKU: 33724
$0.60USD or lower Each
Rubber Stopper #6

Rubber Stopper #6
SKU: 33726
$1.20USD or lower Each
Rubber Stopper #8

Rubber Stopper #8
SKU: 33728
$1.80USD or lower Each
Rubber Stopper #9

Rubber Stopper #9
SKU: 33729
$2.00USD or lower Each
More Information

Miscellaneous Information on Cork Stoppers & Applications

Cork, A Natural Product For Labs As Well As Wine!

Glass Test Tubes with Cork-Chemistry Kitchenware

Belt Tightening to Save Money & Embarrassment

What Are Erlenmeyer Flasks Good For? Home Decor!

 

Technical

Dimensions of Rubber Stoppers

There are: ~25mm/inch
Size Height (mm) Top Diameter (mm) Bottom Diameter(mm) Average Diameter(in)
#00 25 14 10 TBD
#1 25 19 14 TBD
#4 25 26 20 TBD
#6 25 32 26 TBD
#8 29 41 33 TBD

 

Dimensions of Cork Stoppers

There are: ~25mm/inch
Size Height (mm) Top Diameter (mm) Bottom Diameter(mm) Average Diameter(in)
#2 17.5 12.7 9.6 ~7/16
#3 12.7 14.3 11.0 ~1/2
#4 20.6 15.9 11.9 ~9/16
#5 22.0 17.5 13.5 ~5/8
#6 23.8 19.0 14.7 ~11/16
#7 25.4 20.6 15.9 ~3/4
#8 27.0 22.2 17.1 ~13/16
#9 28.6 22.2 17.1 ~7/8
#10 31.8 25.4 19.4 ~7/8
#11 31.8 27.0 21.0 ~15/16
#15 31.8 32.4 27 ~1 3/16
#16 37.4 34.7 27.6 ~1 1/4
#17 38.1 36.5 29.4 ~1 5/16
#18 38.1 38.1 30.9 ~1 3/8
#19 38.1 39.7 32.5 ~1 7/16
#24 38.1 47.5 40.4 ~1 3/4
Frequently Asked Questions

FAQ for Stoppers

Indigo corks are from Portugal & are processed with the highest hygiene standards. They are food safe & differ from wine corks only in that they are tapered to fit test tubes & flasks.