Beautiful shape,Twin Cylinder Double Switch,Oil-free& Piston design .Air Regulator and Manometer Fittings, Provide ... . -Auto stop. -Pressure-adjustable.-Dual switch: Switch 1. Auto stop at 4 bar, auto start at 3 bar. Switch 2. Max pressure at 6 ... output: 30~35L/min.Dual switch: Switch 1: Auto stop, start at 3 bar, stop at 4 bar Switch 2. Max pressure at 6 ...