The Campbell Hausfeld PM063070SV Pressure Washer Plunger Pack Kit helps restore proper pump operation and consistent water pressure during cleaning tasks. Designed as a replacement plunger pack kit, it provides sealing and moving components that work within the pressure washer pump to help move water through the system and maintain pressure. Proper plunger function helps reduce leakag... https://www.wholetoolbox.com/campbell-hausfeld-pm063070sv-pressure-washer-plunger-pack-kit/PM063070SV.html