KOHLER K-4441-7 Persuade Curv Dual Flush Tank, Black Black Includes a two-button actuator that provides easy-to-use flushing options Combines with K-4353 Persuade - Curv bowl to create K-3723 Persuade - Curv Comfort Height two-piece elongated toilet Meets strict flushing performance guidelines established by the EPA's (Environmental Protection Agency) WaterSense program Qualifies as an HET (High-Efficient Toilet) - consumer rebates are available in certain municipalities High-Efficiency Toilets provide significant water savings of up to 16,500 gallons per year versus an old 3.5 gallon toilet without sacrificing performance