Upgrade your bathroom with the Fluidmaster 242 Toilet Fill Valve Seal Replacement Part. This pack of two black seals is specifically designed for Fluidmaster brand toilet fill valves with flapper flushing technology. Measuring at 4.75 inches in height, 0.5 inches in length, and 3.75 inches in width, this seal is perfect for round-shaped toilets with single flush technology. The Fluidmaster 242 is easy to install and will save you money on your water bill by preventing leaks. Add this replacement part to your bathroom today and enjoy a fully functioning and efficient toilet.