... ", 2" and 2 1/2" material: aluminum Size of instantaneous adaptor: 1 1/2", 2" and 2 1/2"Material: aluminumThread ... inst.×Male screw thread adaptor, BS Female inst.×Female screw thread adaptor, BS Male inst.×Male screw thread adaptor, BS Male inst.×Female ... screw thread adaptor,BS Male inst.×Male ...