... Nylon,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTB type female coupler x male thread1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass,Stainless ... ,Brass,Stainless steelBSPP,BSPT,NPTD typefemale coupler x female thread1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass,Stainless steelBSPP ... Nylon,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTDP typedust plug1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass,Stainless steelBSPP, ...