... offer a variety of sizes and shapes of the venturi nozzle, steel,aluminum, nylon and other materials jacket can be ... life will vary. Gas dynamics of venturi nozzle is better than straight-hole nozzle, the vortex is improvedor ceased to exist ... hole nozzle to increase 15% -40%, 20% lower abrasive consumption. We also could provide other types according to customer's request. Boron Carbide Nozzle