... ,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTB type female coupler x male thread1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass,Stainless ... ,Nylon,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTD typefemale coupler x female thread1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass ... ,Nylon,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTF typemale adapter x male thread1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass,Stainless ...