AR1828 Pump Check Valves Kit Perfectly compatible with the following Annovi Reverberi (AR) Pump Models: Valve Kit for RKV Pumps (18mm), RKV3.5G30AD-F24, RKV3.5G40HD-F24, RKV4G37D-F24, RKV4G40HD-F24, RKV4.5G32D-F24, RKV4.5G37D-F24, RKV4.5G40HD-F24, RKV5G40HD-F24, RKV5.5G40HD-F24, RRV3G36D-F24, RRV3.5G36D-F24, RRV4G36D-F24. AR1857 Water Seal Packings Kit Designed to correctly service 3 cylinders for Annovi Reverberi pressure washer pump, compatible with AR, RK, XR, RKA, RKV, XRC and XRA series pumps. Package Includes 3 x AR880320 High Pressure Packing, 3 x AR880330 Low Pressure Seal, 3 x AR961240 O-Rings, 6 x Check Valves and 6 x O-Rings. Material .