Below are standard lab stopper sizes, available with one hole, two holes and in solid. Material: 50 durometer black rubber. Neoprene and Pure Gum are available through special order.
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Item #

Size

Top A

Bottom B

Length C

N/A 14 N/A 3.543 in90 mm N/A 2.953 in75 mm N/A 1.535 in39 mm
N/A 15 N/A 4.055 in103 mm N/A 3.268 in83 mm N/A 1.535 in39 mm
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