Technical Specifications: FEMALE: 1/2", 3/4", 1", 11/4", 11/2", 2", 21/2", 3", 4", 5" MALE: 1/2", 3/4", 1", 11/4", 11/2", 2", 21/2", 3", 4", 5" Materials Used : The materials used to produce brass inserts for high quality copper alloys, CW614N (CuZn39Pb3), CW617N (CuZn40Pb2), CW602N (CuZn36Pb2As), CW511L (CuZn38As), (CuZn21Si3P) Brass Insert Threads : When requested by the client, the different brass insert threads can be: R : UNI EN 10226-1, Rp : UNI EN 10226-2 Rc : UNI EN 10226-1 Gas : ISO 228 NPT : ANSI/ASME B1.20.1 NPSC : ANSI/ASME B1.20.1 M : ISO 262 BSP, BSPT : ISO 228 Parallel & Taper Threads Surface Treatments: The brass inserts can be supplied both untreated and with a nickel surface treatment.