Features: 1.Push Buttom high speed handpiece 2. Rotational speed: 220000-350000round/min. 3. Working Air pressure: 0.18-0.30Mpa 4. Water Pressure: 0.198Mpa 5. Bur Applicable: 1.59-1.60mm 6. Cartridge: Unenclosed, push button 7. Handle Material: Aluminum alloys 8.Single water spray 9. Net weight: 45g 10. Noise level: ≤68 dB 11. Sterilization by autoclave at 135 °C