Quick Coupling(Type:A,B,C,D,E,F,DC,DP) Material :SS 304,316 Size:3/4"-6" Quick Coupling(Type:C) Material:SS304,SS316 Diameter:1/4"-6" temperature:-50°C-450°CThread type:NPT,BSPT,BSPP Applicable scope :water oil gas and some acidSpecial design available