Pyrex 3928-MCTO Lab Glass Crossover Tube with Valve is a laboratory glass component that combines a crossover tube with an integrated valve. Identified by model number 3928-MCTO, it is designed to connect pieces of glassware and provide valve-controlled flow at the crossover point in lab setups. This Pyrex part is intended for laboratory use where a valve-enabled crossover connection between glass segments is required.
