Ring for rtj flange,Size: 1/2 - 24",Pressure Rating: 150 - 2,500lbs Ring (flange)Specifications:This ring use in rtj flange1) Size: 1/2 - 24" 2) Pressure Rating: 150 - 2,500lbs 3) Material: F316, F304, F316L, F304L, A105, F5, F11, F22, 15CrMo, 12CrMoV, Q235,16Mn, 20# flange ring