As an Amazon Associate, we earn from qualifying purchases. Home » Cole-Parmer » EW-40640-75 Barbed to male NPT threaded branch T connectors. Material Polypropylene, NPT(M)(in.) 0.25, Tubing ID(in.) 0.375. Barb... Cole-Parmer . EW-40640-75 Attributes Brand name, Manufacturer name, ManufacturerCole-Parmer