Combination bowl and tank, with seat 12" (305 mm) rough-in High efficiency, ultra-low consumption (1.28 gpf/4.8 Lpf), utilizes 20% less water Meets EPA WaterSense criteria EverClean - Permanently maintains cleanliness of the surface 16-1/2" (419 mm) rim height for accessible application Siphon action jetted bowl with smooth-sided, concealed trapway 2-1/8" (54 mm) fully glazed trapway 9" x 8" (229 x 203 mm) water surface area PowerWash rim scrubs bowl with each flush