NSKI Portable Mini Unit Compressor 4Holes +Water Bottle Water pressure: 0.1Mpa~0.25Mpa;Air pressure for hand-piece: 0.01Mpa~0.4Mpa Control way: Air; Air Pressure input: 4-8kg; Air pressure output: 0-4kg Air pressure to handpiece: 0.01Mpa~0.4Mp+C317a; Water pressure output: 0-2kg Size: 160mmX120mmX80mm We also have 2 holes in stock if you want 2 holes please contact with us.