-High speed handpiece: 3 water spray + 3 air Spray. -Chuck type: push button. -Noise: ≤68dB. -Bur Spplicable: Ø1.59-Ø1.6mm x 21-23mm. -Rotation speed: ≥300,000rpm. -German dynamic balance: Each movement is balanced by a German dynamic balancing machine. the bearing capacity of the shaft is even and stable, the noise is lower, and the service life is longer. **Excluding Delivery** **For further product information , please contact Chat support**