Hayward SPX4000T Seal Plate O-ring Replacement for Hayward Northstar Pump Seal plate o-ring replacement Fits hayward northstar sp4000 pump series models sp4005(ns), sp4007(ns), sp4010(ns), sp4015(ns), sp4020(ns), sp4030(ns) Also fits hayward northstar sp4000x pump series models sp4007x10(ns), sp4010x15(ns)/2(ns), sp4015x20(ns)/2(ns), sp4020x25(ns)/2(ns), sp4025x30(ns), sp4015x202 Weighs 5-pound