Kit, HP Check Valve Repair, Inlet - Outlet, SLI-SLII, 60K. Used on Early Model SL I and SL II units. Each 05115985 kit includes the following parts: 4 each of 10086288 Ball, 10 each of AS6300960 Seal Washer, 4 each of AV300260 Ball Retainer, 4 each of AV500260 Compression Spring and 5 each of AV617274 Seats.