... lock grooved quick coupling 1.Coupling material include Aluminium,brass,pp,stainless steel. 2.Coupling type:A,B,C,D,E ... ,F,DC Camlock quick couplingCoupling material: brass (PP, al,brass, stainless steel are all avaiable)Type: A B ... flat hose, fire hose and others. Quick coupling(aluminium,brass,pp,stainless steel)