Kit 1.5 GPF Watersaving (black relief valve). For use on all diaphragm-type exposed or concealed Regal valves and pre-1997 Royal valves. Contains A-19-A relief valve, A-15-A molded disc, A-156-A diaphragm and A-163-A plastic guide. OEM reference # 3301037. For Sloan valves. Carded.