Part Number: 7301111-0070A, Gasket and O Ring Repair Kit for Compatible with select American Standard Champion 4 and Eljer Titan 4 model toilets. Package Includes: 2 x Gasket + 2 x O Ring, Gasket outer diameter - 4 1/4", O-ring outer diameter - 9/16" Toilet gasket seals wear out over time and need to be replaced, replacement creates better flushing pressure and results in a quieter toilet. PREMIUM QUALITY: The replacement part is made from durable high quality material and well-tested by the manufacturer 5 Minute Install --Installation instructions for proper use below. Installation is simpler than you expect, and does not require you to remove the base of the toilet. Pack of 2 for a great value! Please note -- This is an aftermarket replacement product, meeting or exceeding the quality of OEM rings (based on in-house testing). We have no affiliation with or endorsement from American Standard GUARANTEE: Discount Parts Direct is a US based company, from molding, stamping to assembly, inspection of each process has strict quality requirements and hand check. We offer customer 100% Money Back Guarantee. We appreciate your business. Instructions:Step 1: Turn off the water supply.Step 2: Flush to drain the tank.Step 3: Unscrew the black nut and place aside (without disconnecting the chain).Step 4: Remove the O Ring from the black nut and replace with the new O Ring.Step 5: Remove the green top cover with the gasket.Step 6: Remove the old gasket from the top cover and replace with the new gasket (the light blue ring).Step 7: Lift the post with the bottom cover, place the top cover with the gasket on top and twist to the right until it is nested.Step 8: While still holding the post, screw the black nut back on until you hear two clicks and it is fit into the placeholders. Do not overtighten the nut or it may snap off.Step 9: Allow post to slide back into place.Step 10: Turn water supply back on and allow tank to refill.