... npt,bsp coupler PP camlock coupling( cam and groove couplings) Advantages:1.lightweight,economicPolypropylene (PP) quick release ... Polypropylene,Nylon,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTC typefemale coupler x hose shank1/2" ~ 8"Polypropylene,Nylon,Aluminum ... ,Brass,Stainless steelBSPP,BSPT,NPTD typefemale coupler x female thread1/2" ~ 8"Polypropylene,Nylon,Aluminum ...