Gast K882 Repair for AT03, AT05, 0523, 0323, RV03, RV05 After many years of operation, the carbon vanes will wear down or shatter, causing the unit to stop or not lose airflow. Installing this repair kit can return the pump to normal functionality. Repair Kit Includes (4) 1-1/4'' Wide Carbon Vanes (2) Internal Filters (2) External Filters (2) O-Rings (1) Gasket Seals (1) amber spacer gasket Installation Instructions If your compressor sounds like the bearings are going out, we recommend you get a new one.