Ace Glass 75/50 Socket Joint Borosilicate Glass ? Glassblower Lab FittingDescription: This listing features a 75 50 socket joint manufactured by Ace Glass, Inc., designed for custom glassblowing, repair, or modification of scientific glassware. Precision made from high quality borosilicate glass, this large joint fitting is commonly used in distillation columns, reactors, and lab scale process equipment requiring secure connections between components. Ideal for laboratory glassblowers and custom apparatus builders.