SX200Z4PAK2 O-Ring for Hayward ProGrid, MicroClear, ProPlus, ProSeries, Super StarClear Pool Filters and Valves, O-64 (Set of 2) Part Description: Valve/Union O-Ring For MicroClear, ProSeries, ProGrid & S200/240 Sand Filter. OEM Discontinued for Super StarClear & Vari-Flo Valve Inside Diameter: 2-1/4" Outside Diameter: 2-1/2" Cross Section: 1/8" Cross Reference: 07-1426, 071426, 13-0011-02-R, 13-0013-00-R, 17022868R, 39102800, 43-3091-03-R, 43-3092-02-R, 467170, 46717000, 47-0228-01-R, 47-0228-35-R, 47-0228-68-R, 47022868, 55-1150BSS, 551150BSS, 723R0049003, 805-0228B, 9231000, HAY0512203, O-2165, O-64, O64, P-24102, P24102, R0558701, S200Z4, SX200Z4, U9-205, U9205, 90-423-5228, ALDO-64-0, APCO2334 SX200Z4PAK2 O-Ring for Hayward ProGrid, MicroClear, ProPlus, ProSeries, Super StarClear Pool Filters and Valves, O-64 (Set of 2) Part Description: Valve/Union O-Ring For MicroClear, ProSeries, ProGrid & S200/240 Sand Filter. OEM Discontinued for Super StarClear & Vari-Flo Valve Inside Diameter: 2-1/4" Outside Diameter: 2-1/2" Cross Section: 1/8" Cross Reference: 07-1426, 071426, 13-0011-02-R, 13-0013-00-R, 17022868R, 39102800, 43-3091-03-R, 43-3092-02-R, 467170, 46717000, 47-0228-01-R, 47-0228-35-R, 47-0228-68-R, 47022868, 55-1150BSS, 551150BSS, 723R0049003, 805-0228B, 9231000, HAY0512203, O-2165, O-64, O64, P-24102, P24102, R0558701, S200Z4, SX200Z4, U9-205, U9205, 90-423-5228, ALDO-64-0, APCO2334