KOHLER Highline 10 in. Rough In 2-Piece 1.28 GPF Single Flush Elongated Toilet in White Seat Not IncludedKOHLER Highline 10" Rough In Toilet The KOHLER Highline 10 in. Rough In 2 Piece Toilet offers water efficiency and style. With a 1. 28 GPF flush setting, it saves up to 16,500 gallons annually while powerful flushing is retained. An Insuliner tank liner helps reduce condensation, making it ideal for humid environments. Key Features: Water Efficiency: Uses just 1. 28 gallons per flush, saving thousands of gallons each year. Comfort Height: Chair height