This Rolair Gas Belt Drive Air Compressor features a 5 HP Honda engine, a single stage with a 9 gallon tank capacity and displaces 13.1 cubic feet with 8.7 free at 100 PSI. This unit is built to last with automotive-style bearing inserts on the connecting rods, ball bearing crankshaft, splash lubricated pump and cast iron cylinders. An oversized flywheel and aftercooler help keep things running cool. A totally enclosed two piece heavy gauge belt guard makes operation safe. Rolair compressors have a proven track record for longer life on the job site. You can depend on Rolair because they are built to last.