1. Head: large torque head 2. Air pressure at the back end of HP: 250KPa--300KPa(300KPa preferred) 3. Air pressure at the gauge in the dental unit: 277-316 K Pa (2.8-3.2 k g f /cm2) 4. Water pressure :198Kpa (2 kg) 5. Rotation speed :300,000-450,000 rpm 6. Head hight :14.5 mm( standard ) 7. Head diameter :φ12.5 mm( torque ) φ11.2 mm( standard ) 8. Chuck type : push button 9. Bur applicable :φ1.59mm~φ1.6mm×21mm~23mm (diameter×length) 10. Noise :≤60dB