Application: 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. High Performance: Specially designed to easily and properly replace/repair the old or broken valves, prevents your pressure washer from leaking and prolongs the service life of your pump. Comparable to OEM part number AR1828 both in quality and function. Function: .