1.sandblast coupling 2.1'',1/2'',3/4'',1/4'' 3.material:alundum,alloy We supply sandblast accessories with excellent quality and best after service. Please find our standard products As follows: Sandblast Coupling ( Hose Couplings, Female Thread, Nozzle Holders, etc. ) Sandblasting fittings: Blast hose/air hose coupling: Nylon, brass, aluminium, cast steel Sand blast Nozzle hoders: Nylon, brass, ...