The o-ring is a replacement part that was made by Pentair. The same high-quality materials were used to manufacture the original factory part. Making this a genuine OEM product. This will fit both inline and offline Chlorinator Rainbow Models 300/320
Used with the following Pentair Automatic Feeders:
- Model 300, 302, 300-19, 300-29
- Model 300-29X
- Model 320
- Model 322
