(HP) Handpiece Totally sealed (lubricated for life), non-ventilated, dust-proof, splash-proof motors. Balanced rotor and shaft, vibration-free - quiet operation. SPECIFICATIONS Frequency: 60.00 Hz Nameplate Output: .25/.06 Number of Poles: 2, 4 Phase: 1 Product Style: DENTAL LATHE Shaft Diameter: 0.376 IN Speed: 1800 rpm, 3600 rpm Voltage: 115 V