1.tungsten steel material 2.function:connection/coupling 3.3/4''-2'' We supply sandblast accessories with ... after service. Please find our standard products As follows: Sandblast Coupling ( Hose Couplings, Female Thread, Nozzle Holders, etc. ) Sandblasting ... (Brass, Aluminum, SS316, SS304, PP and Nylon) Guillemin coupling Aluminum and Stainless steel Safety clamps (conform to DIN2817), Aluminium ...