Technical Data HG-1 Air pressure(bar-psi) 4.0-8.0bar(60-115psi) Air inlet 1/4" Air consumption(cfm) 8.0-14cfm Capacity of cup(ml) Aluminum 6000ml Feed type Gravity Available in(mm) 4mm-6mm-8mm Technical Data HG-2 Air pressure(bar-psi) 4.0-8.0bar(60-115psi) Air inlet 1/4" Air consumption(cfm) 8.0-14cfm Capacity of cup(ml) Plastic 6000ml Feed type Gravity Available in(mm) 4mm-6mm-8mm Technical Data HG-3 THE PROFESSIONAL HOPPER GUN Three(3)solid brass air nozzles (4mm 6mm 8mm) Air shut-off vavle. Operates with compressor with minimum 7CFM at 25PSI. Full length swing trigger for greater control and less fatique-50% less effort to pull. Aluminum body with comfortable handle and extra long trigger. Leak resistant material orifices prevent drywall compound from dripping. Large capacity,heavy-duty plastic hopper with built-in angle allows spraying of ceilings and walls. Very generous handle radius makes for the most comfortable grip on the market. Technical Data HG-4