Fix cracked fill valves and running toilets in a 2-Pack kit Easy to install Universal design fit’s most 2 in. flush valve toilets Solid frame flapper for ultimate reliability - no twisting and best seal every time Built-in Microban fights flapper breakdown due to bacteria Replaces damaged fill valves and leaky flappers Optimize your toilets performance with both fill and flush solutions this 2-Pack and save on the Fluidmaster 400CR Toilet Fill Valve and 2 in. Toilet Flapper Repair Kit. Featuring the #1 solution to fix noisy or running toilets the 400A universal toilet fill valve. This complete fill and flush toilet repair kit includes the Fluidmaster 400A toilet fill valve and the Fluidmaster 501 2 in. flapper. Quick and easy installation and a 5 year warranty make this kit perfect for a multi-toilet upgrade solution. Best with 3.5 GPF and 1.6 GPF toilets. Solve common toilet fill problems, with the proven 400A toilet fill valve anti-siphon design. While the reliable 501 2 in. flapper helps prevent leaks with a solid frame build, and corrosion resistant materials. Fix and upgrade your toilets overall performance in one proven Fluidmaster Kit 2-Pack.