Good point: They're round. Cons: Compared to the original O-rings on the two existing filter housings, these O-rings are thin, light and the wrong size. In the case of a filter housing with an internal thread, the rings are too small in diameter and do not fit into the channel provided to accommodate the sealing ring. For a male filter housing, the rings are too small, they have to be stretched to fit, resulting in significant leakage. Bite the bullet and OEM product. However, Revain will refund your money immediately and in full.
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