American Standard Polished Chrome Non-Diverting Tub Spout, IPS Threaded Connection, Durable Construction - 072325-0020A

Hello there! Thank you for your interest in the American Standard 7381042-0070A Flush Valve Seal. We have contacted American Standard and we're sorry to say that the information about the inside and the outside diameter of this seal is not available. The information available are the dimensions of the 7381042-0070A. It has a length of 2.5 inches, a width of 2.5 inches, and a height of 0.1 inches. This flush valve silicone seal is used for the American Standard 4339.216 and 4339.516 Toilet Tanks. You can also check this Installation Guide for more information. We hope this helps. Should you have further questions, don't hesitate to ask. PlumbersStock is happy to assist you with your plumbing questions, have a great day!

Ahoy! Thanks for your interest in the American Standard 7381042-0070A seal. No, this flush valve seal will not work with your 4270A tank. The American Standard 4188A.104.020 toilet tank is what you need. Order yours now by simply following the link to its product page, clicking the "Add to Cart" button, entering the required information, and you'll be on your way. We thank you for choosing PlumbersStock. We are always happy to serve you!