stainless steel quick coupling C precision casting A,B,C,D,E,F,DC,DP type good quality,outlook ... casting3.CNC precisely machined.A Couplingcamlock coupling1.size:1/2"-4"2.body:stainless steel 304 316.3.gasket:buna(NBR ... ),viton and Telfon.4.specification:MIL-C274875.test pressure:3/4"-2" 250PSI(17.6bar) 3"-4" 200PSI(14.8bar) ... (NPT), BS21,DIN259,DIN2999,ISO228 stainless steel quick coupling C