quick coupling pipe joints Size: 1/2"-8" Material: Aluminum,SS Thread:NPT,BSPT,BSPP Other type: A,B,C ... ,D,E,DC,DP quick coupling pipe joints Competitive ... Advantages of the product1: Precision investment coupling 2: CNC precisely machined 3: Easy to connect ... steel plants, atomic energy, power plants ect. quick coupling pipe joints