Drilled #11 Rubber Stopper

Description

#11 Drilled Rubber Stopper, made in Canada by our friends at Vintage Shop. Fits holes roughly ~50-53mm. 3/8 Drilled hole to fit airlocks and tubing. This Problem Solving size is somewhat non-standard, be sure this the size you need. (See Below and Size Chart). Safe, food-grade, BPA-free, injection-molded pure white gum rubber that provides an excellent grip and air-tight seal on glass and PET surfaces even when wet. Not for laboratory use. Maximum Temperature: 158F (70C).

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