New Fluidmaster PerforMax 502P21 Universal Water-Saving Toilet Flapper - for 2’ flush valves.
Adjusts for maximum flush efficiency.  Fixes most common cause of a running toilet.  Rigid frame aligns flapper properly on every flush.  Micro ban prevents growth of harmful microbes.   Built-in Microban fights flapper breakdown due to bacteria on the flapper itself.  Best for 1.28 - 3.5 GPF+ toilets and Easy to install.
Adjustable for maximum performance and water savings.