Review on 5-Pack of Kohler-Compatible Canister Flush Valve Seal Replacements (Equivalent to K-GP1059291) - Ideal Replacement Parts for GP1049291 Tank Canister Gasket Kit - By IMPRESA by Brian Garrett

They fit just as well as the original gaskets and have been running for a few days with no leaks. I will update this review if there are any issues. I suspect that people who have had issues with leaks may have overlooked residue left on the valve from the previous gasket/seal. When I removed the old one, small pieces of rubber stuck to the top and bottom of the valve and the channel where the gasket sits. I used a washcloth and cotton swab to remove any debris before installing a new gasket that didn't leak.