Balboa Control 1B Round Button On/Off (5011028001)
- Phone Jack on the under side of the button
- The oval button was made for Aquaglass (which is now out of business)
- There have been some cases where the new button is slightly larger than the hole in the tub.
- If this is the case with your new button, simply enlarge the hole in the tub with a small half round file.