This impeller ring is designed to use with Hayward TriStar pump series SP3200EE, SP3200X, SP3600 models SP3205EE, SP3207EE, SP3210EE, SP3215EE, SP3220EE, SP322063EEV, SP3230EE, SP3250EE, SP323063EE, SP3205X7, SP3207X10, SP3210X15, SP3215X20, SP3220X25, SP3225X30, SP36075EE, SP36120EE and also fits Hayward NorthStar pump series SP4000, SP4000X models SP4005(NS), SP4007(NS), SP4010(NS), SP4015(NS), SP4020(NS), SP4030(NS), SP4007X10(NS), SP4010X15(NS)/2(NS), SP4015X20(NS)/2(NS), SP4020X25(NS)/2(NS), SP4025X30(NS). Compatible with Hayward Super II pump series models SP3016C, SP3021C, 3026C and also fits EcoStar pump SP3400VSPVR. For 2, 2-1/2 and 3-horsepower. Weighs 2.1-pound.