Gerber® Maxwell® Toilet Bowl – The Starting Line Of Performance For Gerber Toilets With A Large Water Surface For Exceptional Bowl Cleaning – Toilet Bowl, Tank Sold Separately – Round Bowl – 14-7/8″ Bowl Height – 10″ Or 12″ Rough-In – Compatible With 1.6 Or 1.28 GPF Gerber® Maxwell® Tanks – Uses 20% Less Water Than Standard 1.6 GPF Toilet When Paired With 1.28 GPF Tank – Limited Lifetime Warranty – Use With Gerber Maxwell Toilet Tank Only (189871 1.6 GPF, 404828 1.28 GPF, 189873 10″ Rough-In 1.28 GPF)