Hayward SPX0560EA Clamp Screw with Nut Replacement for Select Hayward Underwater Lights Clamp screw replacement Fits hayward duralite series underwater lights models sp0560, sp0570 Also compatible with hayward astrolite cord and series, ec50c and basic modular filter models sp0584sl30, sp0584slb30, sp0580s50, ec50c80x5s, ec75a Weighs 20-Pound