34/45 Glass Stopper

34/45 Glass Stopper is a precision-ground, high-clarity borosilicate glass plug designed to fit 34/45 ground-glass joints in laboratory and processing glassware. It provides a tight, leak-resistant seal that helps prevent vapor loss and contamination while allowing easy insertion and removal. Ideal for distillation, extraction, and general lab applications where dependable, chemical-resistant closures are needed.