Single o-ring compatible with OK25 OmniFilter O-Ring 3/16" thick for U25 Filters
- This is 3/16" thickness not 1/8"
- These do not fit the U25 E series Omnifilter
- Helps to create tighter seals, reducing the risk of damaging leakage.
- For best results, these O-rings should be changed with every third water filter replacemenT