PRO45C Fluidmaster Pro Series Fill Valve and Flexible 2" Flapper Kit The Fluidmaster PRO45C Pro Series Fill Valve and Flapper Kit offers a top solution to solve both noisy toilet and running toilet problems in one kit. Including the PRP45 toilet fill valve for a universal and proven design, and the PRO54 2" flexible frame flapper, for a secure seal and durability. Designed to work on 2" flush valve toilets. Chlorine and hard water resistant build for a long lifespan. Code approved, anti-siphon design. Solve slow fill and running toilet problems fast with this Pro Series Repair KitEasy to install with a height adjustable fill valveUniversal design for 2" flush valve toiletsIncludes: PRO45 fill valve and PRO54 2" flapperChlorine and hard water resistantFlexible frame flapper for a secure fit and sealReplace old ballcocks and corroded flappers5 year warranty