Technical Specifications: FEMALE: 1/2", 3/4", 1", 11/4", 11/2", 2", 21/2", 3", 4" MALE: 1/2", 3/4", 1", 11/4", 11/2", 2", 21/2", 3", 4" 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, UNI EN 10226-2 Rp UNI EN 10226-1 Rc UNI EN 10226-2 Gas ISO 228 NPT ANSI/ASME B1.20.1 NPSC ANSI/ASME B1.20.1 M ISO 262 BSP, BSPT (Parallel & Taper Threads) Surface Treatments: The brass inserts can be supplied both untreated and with a nickel surface treatment.