MK Dent Prime Line High Speed Handpiece; Power Head (25 W) with Fibre Optic for Sirona "R/F"®* Coupling SystemManufactured in Germany. Available in NSK, W&H, KaVo, Sirona couplings. Power (Torque) Head (25 W) with 4 Hole Spray Small Head (18 W) with 3 hole spray Premium Spindle with Carbide insert for Perfect Concentricity 40,000 LUX Glass rod light conductor Self Pressure Reduction to 2. 8 bar in all KaVo types Integrated Non Return Value to prevent cross infection Incredibly Quiet Low operating Noise (only 55 dBA)" 350,000 rpm Refined ceramic ball bearings