The Makita BO3710 1/3 Sheet Orbital Sander has the following specifications ; Abrasive Paper Size: 93 x 228 mm. Orbits per Minute: 11, 000 opm. Pad Size: 92 x 185 mm. Strokes per minute: 22, 000 spm. Input Wattage: 190 Watt. Vibration sanding: 3.5 m/sec