Details: *Our toilet seal is made of high quality silicone material, compared with ordinary rubber toilet seal, our product is better resistant to chlorine and other chemicals in the water supply and has a long service life. Can fixe leaks and prevents flushes from happening. Outer diameter is 4 1/4". Inner diameter is 2 3/4''. *Easy to install: 1. Turn off the water supply and drain the tank. 2. Unscrew the black nut without disconnecting the chain. 3. Remove the O Ring from the black nut and remove the green top cover with the gasket. 3.Replace the old gasket with a new one. 4. Lift the post with the bottom cover and place the top cover with the gasket on top, clicks and allow post to slide back into place. * flush valve seals to meet your daily use and replacement needs. No need to spend a lot of money to get a repairman to fix it, our products can save you time and money. *parts 7301111-0070A. Specification: Material: Rubber Color: blue Package Contents: 2 sets/6 sets valve seal. Features: LLDI Silicone Flush Valve Seal Kit 730111-0070A Toilet Tank Gasket Replacement 6 Widely Use: Ideal for use in kitchens, bathrooms, salons and utility sinks. Storeage Convenience: Convenient to storage, easy to install and use. High Quality: Good product performance and can improve the quality of life. Notice: Pls kindly check the decription before you order. Any other in need pls contact with us directly