1) brass check valve, sizes as below: 2) 1/2", 3/4", 1", 1. ... ", 1.1/2", 2" 3) High Precision 4) CNC machining brass check valveSIZE: 1/2", 3/4", 1", 1.1/4", 1 ... As factory, we specialize in this field for several years, with good quality and pretty competitive price.Send us the drawings ...