Diffuser gasket replacement * Fits hayward superpump models sp1600x5, sp1605x7, sp1607x10, sp1608x10, sp1610x15, sp1611x15, sp1615x20, sp1616x20, sp1621x25 * Also fits super ii, maxflo pump models sp3010az, sp2810x15 * Weighs 2.5-Pound