Hayward SPX1600R Diffuser Gasket Replacement for Select Hayward Pumps 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