Includes all 3 rings for the larger, low-pressure (LP) piston for the B5900 air compressor pump. Hone the cylinders before installation.

Air compressor oil site gauge and gasket. Replace if cloudy or leaking.Specifications 1" diameter

Includes all four (4) rings for the smaller, high-pressure (HP) piston (hone the cylinders before installation). For the B5000 and B5900 model air compressor pumps. If you have a sudden loss of performance or if the pump is using too much oil, replacing...