O-ring for 5" x 5" plate/flange spa heater element.
- 4-3/8" outside diameter x 3/16"
- Chemically resistant
Product notes: Related part numbers are 568-345, 60-0001.
WARNING: Cancer and Reproductive Harm
Worked great even if not it's original purpose. I also purchased a filter. Spa Depot is the only place that had one for my older tubs.