Marathon Mat-300W High Speed Laboratory Air Turbine-Water Type with mat-H300W Handpiece. Features: Compact size main unit, speed control pedal, easy to control water rate and air pressure, simple chuck handle system. Specs: operation pressure: 2.5-3.0 bar, air consumption: 40L/min, water supply capacity: 170ml, dimensions: W234xD99xH190 (mm). Handpiece rotation 320,000rpm, chuck diameter: 1.6mm.