The Colony 3 lined toilet tank only from American Standard enhances the features of the coordinating bowls, 3437A101, 3437C101 and 3437D101, sold separately. Made of vitreous China, the tank is a water-saving design that reduces water consumption by 20% without sacrificing performance and features a lining to reduce condensation on the outside of the tank.Prevents condensation – fully lined toilet tank helps to prevent water condensation on the outside of the tankValue priced – affordable price and reliable performanceHigh-Efficiency Toilet (HET) – powerful and efficient toilet uses 1.28 gpf/4.8 lpfEasy-to-clean – made of durable vitreous ChinaPowerful flush – equipped with a 3 in flush valveWaterSense certified – uses less water while maintaining great performance