Air compressor o-ring gasket that installs in between the cylinder cup and the valve plate. NOTE: This gasket does not go on the piston.

Head O-ring Gasket for the pump. This is the gasket directly under the head and on top of the valve plate.

Drive Belt, .650" wide (5/8"), 6" Diameter.  Is your motor turning yet you have no pressure? Typically this is caused by a torn belt. To make installation easier, "walk" the belt onto the pulleys like you would a bicycle chain.

For air filter.