Pentair IntelliChlor Plus60, 60K Gallons (521105) (523738) gecko The holes style 11 button design The holes style 11 button design gives this overlay practical value because some keypad assemblies require a very specific cutout and alignment pattern rather than a broad generic graphic layer A focused replacement like this is especially useful when the surrounding lid and tank remain serviceable and the weakness is isolated to the ring itself Supports more convenient and consistent pool sanitizing It can be a strong replacement choice when an older cell or chlorine generator is no longer producing reliably or when the system is being upgraded to support higher demand