Features 1) One Kit Services One Pump 2) Replacement for AR Pump Check Valves Kit - Kit 1828, Valves and O-Rings 3) Complete Valve Kit Includes Six O-rings and Six Check Valves Complete 4) High Quality Metal, Rubber and Plastic Material for Best Performance, Made in Italy 5) Kit fits 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