If I saw an O-ring with less than 4.5 stars on Amazon, I would assume it's due to piles of 1-star ratings due to it leaking, being the wrong size, etc. If ther

If I saw an O-ring with less than 4.5 stars on Amazon, I would assume it's due to piles of 1-star ratings due to it leaking, being the wrong size, etc. If there is no conceivable way a product could be improved, it's worth 5 stars.