Review on High Performance 2 Pack Toilet Flapper Replacement by Hibbent - Easy to Install, Gerber 99-788 Compatible - Blue Color by Gary Newman

They are NOT easy to remove. Over time, all corks harden with age. Their design makes it difficult to remove. They are not a traditional on/off clip. When new, the plastic is malleable. They just show up. No problem. Removing the old one is much more difficult. We ended up just cutting them off with scissors. However, I would buy them again. They seem to be doing their job. However, note that removing it will require more work in the future.