The Campbell Hausfeld 059-0097 Air Compressor Honbase Pump Breather HB55 75 100 maintain proper airflow and pressure balance within compatible air compressor pump systems. This breather component is designed to vent internal crankcase pressure while filtering out contaminants, supporting smooth and efficient pump operation. By allowing clean air exchange during compression cycles, it ... https://www.wholetoolbox.com/campbell-hausfeld-059-0097-air-compressor-honbase-pump-breather-hb55-75-100