Korky 723X Standard 2-Inch Top Mount Flush Valve For 1-Piece Toilet Models, Red Product Description Fits 2" one-piece toilets, including American Standard. 7.5" overflow tube height. Easy to install (installation driver included). Engineered materials resist chlorine.. From the Manufacturer Fits 2" one-piece toilets, including American Standard. 7.5" overflow tube height. Easy to install (installation driver included). Engineered materials resist chlorine. Five year guarantee. FIT: One-piece, 2 inch toilets, including American Standard EASY TO INSTALL: 7.5 inch overflow tube height WHY KORKY: Our high quality toilet products are universal specific to both older modern toilet models. Our repair parts are easy to install made exclusively from long lasting chlorazone red rubber. REPLACEMENT TOILET PARTS: Try Korky Toilet Repair because we continue to commit to designing toilet repair parts that are unviersal to fit the majority of toilets. Designed manufactured in Wisconsin, USA. HIGH QUALITY!