The Astro Pneumatic 3036 Air Belt Sander (10 X 330Mm) With 3Pc Belts (#80, #100 And #120) Simple Belt Tension Lever Non-Slip Handle Grip Variable Speed Control Increased Pulley Space For New Thicker Belts Unit Comes With: 1 - Sanding Belt 80 Grit - 10Mm X 330Mm, 1 - Sanding Belt 100 Grit - 10Mm X 330Mm And 1 - Sanding Belt 120 Grit - 10Mm X 330Mm Specifications: Free Speed: 16,000Rpm, Size Of Belt: 10Mm X 330Mm, Average Air Consumption: 4Cfm, Overall Length: 1259 (320Mm) , Net Weight: 209Lbs (095Kg), Air Inlet: 14, Air Pressure: 90Psi