Details: *Our toilet seal is made of high quality silicone material, compared with ordinary rubber toilet seal, our product is better resistant to and other s 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 . 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 to get a repairman to fix it, our products can save you time and . *parts 7301111-0070A. Specification: Material: Rubber Color: blue Package Contents: 2 sets/6 sets valve seal. Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Our toilet seal is made of high quality silicone material, compared with ordinary rubber toilet seal, our product is better resistant to and other s 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 . 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 to get a repairman to fix it, our products can save you time and . parts 7301111-0070A. Specification:Material: RubberColor: blue