Rol-Air compressors are available in a range of configurations. The model 6590HK18 is a 6.5-hp Honda-driven gas compressor that produces 13.1 cfm at 100 psi, has OHV, and low-oil shut-down. The 6590HK18 gives users approximately 40 percent more air than a 5.5-hp unit, and standard features include cast iron cylinders, 36 oz oil in the crank case, an oil sight glass, and an after cooler.