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