... casting A,B,C,D,E,F,DC,DP type good quality,outlook and price stainless steel quick fitting B ... coupling1.size:1/2"-6".2.body:stainless steel 304 316.3.gasket:buna(NBR),viton and Telfon4.specification:MIL-C27487 ... (NPT), BS21,DIN259,DIN2999,ISO228. stainless steel quick fitting B type