Manufacturer Part Number: 5540C|Amperage|Speed (RPM)|13000Voltage|Air Pressure (psi)|90Air Inlet Size (Inch)|1/4Minimum Disc Size (Inch)|4-1/2Exhaust Location|BottomMaximum Disc Size (mm)|Maximum Disc Size (Inch)|4-1/2Pad Size|3in; 4.5inFor Use With|4.5" Abrasive DiscsCord Length (Feet)|CFM at Full Load|Spindle Size|7/16-20Throttle Type|TriggerIncludes|3" & 4.5" Backing Pad, Spindle Wrenches, Parts List, Safety & Instruction ManualInlet Size (NPT)|Inlet Size (Inch)|Horsepower|Battery Included|Battery Chemistry|Battery Series|Overall Length (Inch)|Air Consumption CFM|28.00Number Of Batteries Included|Overall Length (Decimal Inch)|4.3000UNSPSC Code|27112742