stainless steel quick coupling C precision casting A,B,C,D,E,F,DC,DP type good quality,outlook and ... pressure:3/4"-2" 250PSI(17.6bar) 3"-4" 200PSI(14.8bar) 2 1/2" 225PSI(15.8bar)6" 150PSI(10 ... .1(NPT), BS21,DIN259,DIN2999,ISO228 stainless steel quick coupling C