Intermatic Air Control Box [230v] [One Circuit] [On Off] (RC2112S) o rings Stainless steel face rings help Stainless steel face rings help frame underwater lights while adding corrosion resistance and a finished appearance at the pool wall and WB compatibility and 7 1 4 inch diameter by 6 inch height relationship give this float practical value because skimmer float parts work best when they match the original dimensions and movement style closely This part has practical value because the one circuit on off configuration offers a more focused solution for simpler controlled applications where multi function capability is not required and this Intermatic version is a 230 volt one circuit on off model using the RC2112S reference