... >Size:16,20,25,32 3>Cert.:ISO9001 Brass Fitting Male Thread Elbow:1>Material:Brass 2>Size:L16*1/2M,L16*3 ... *3/4M,L32*3/4M,L32*1M3>Cert.:ISO9001 MG brass fittings use the advanced mold forging process, material density is ... of Acid, Alkali, salt and gas, oxygen, compressed air etc.brass fittings used for aluminum plastic composite pip