This 0.4 horsepower, variable speed industrial air belt sander has a belt 12 inches in length x 1/3 in width and an overall length of 13 3/8 inches. It has a rear exhaust with a minimum hose size of 1/4 inch and an air inlet of 1/4 inch NPT. It's free speed is 20,000 RPM and the average CFM at a 15 second run time is 10.80. Its required pressure is 90 psi. It has a lever throttle, an aluminum handle and a composite housing. Includes three contract arms, five belts, and one hex key.