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Permit insertion of hypodermic needles
Remains useful even after long exposure to moderate heat
Rubber with removable glass stem ground at 45° angle
Holders for glass crucibles
Light tan rubber stoppers
14-130EE RUBBER STOPPER NO3 APPX
RUBBER STOPPER NO3 APPX
Soft, durable, resilient rubber designed for long life.
Multi-purpose and economical