All-steel manufacture with 3mtr rubber hose, tungsten carbide nozzle and in-line water trap for moisture free grit blasting. Supplied with bayonet airline coupling and full instructions. Both models accept a variety of grits up to 800 microns and are suitable for stripping rust and paint from wheels, chassis, panels and other corroded/painted surfaces. SB990 is a hand portable unit and SB991 features wheel mounted grit tank and grit flow valve for fine control.