... air pressure, no valve type structure, low air consumption Main Technical Parameters:TypeHole Dia(mm)Tool Dia. (mm)Air Consumption (m3 ... Φ50,60WC8595-110853-40.5-0.680-12010-16111223Φ60,73WC110115-180102/1064-60.5-0.7180-42012-15120042Φ73,89WC130135-1501244 ... -60.7-0.11601892360Φ73,89WC150150-1801426-100.5-1.2200- ...