Products >> Micromotors / Handpieces >>"D3" Series Feature: Improved motor technology for polishing, cutting, grinding, curving? Increased torque. High power for every working situation 4 NMB world-class heavy bearings parallel last forever New flexible handpiece cable, ultra-slim, ultra-light, more freedom of movement during work Additional cooling Hard alloy burs last 200 times longer than usual burs or needles International standard motor-interface for E-type straight or contra angle or air turbine handpiece General specifications: Power Supply: AC 120V or 230V 50/60 Hz DC output: 9-20v ≤3.5A Speed range: Stepless adjustment from 8,000-2, 0000 R.P.M Concentricity deviation: 0, 02 mm Max torque: 690 gcm Dimensions: 17cmx12cmx7cm Weight：3.8kg Warranty: 1 full year Patents: ZL00230062.1 ZL02228065.0 System Contents: D3 Control unit D3 E-type motor D3 straight piece (optional at D31, D32, D33) Foot pedal Handpiece Stand Burs included: 3 (click to pick your favorite)