E type low speed handpiece. 1:1 Ratio, with externel cooling system Air Pressure: 245~392Kpa (2.5~4.0 kgf/cm2) Water Pressure: 198Kpa (2 kg) Rotation Speed: 22,000~27,000 rpm Chuck Type: Latch type Bur Applicable of Being dental handpiece: Φ2.334~2.355 mm Noise: ≤70dB