With its insulated tank, durable steel frame, large flush actuator opening, and adjustable height, this in-wall carrier provides unparalleled installation flexibility. Robust steel tube frame. Insulated tank to prevent sweating. Large flush actuator plate opening can be removed for easy access to the inner tank. Adjustable height allowing the bowl to be set anywhere from 15-3/8 inches to 28-1/2 inches from floor. Dual flush actuator offers a choice of 0.8 or 1.6 gallons per flush (gpf). Works with K-6299 or K-6918 bowls and K-4177, K-8857, K-75891, K-5413, K-75890, or K-77271 flush actuator plates to create a complete solution. Durable steel frame carrier is installed on 2"x4" studs behind the wall. See installation guide for more detailed information.