... 1.lightweight,economicPolypropylene (PP) quick release camlock couplingsTypeDescriptionSizeMaterialThreadA type male adapter x female thread1/2" ~ 8"Polypropylene,Nylon ... Brass,Stainless steelBSPP,BSPT,NPTB type female coupler x male thread1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass, ... Aluminum,Brass,Stainless steelBSPP,BSPT,NPTF typemale adapter x male thread1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass, ...