Concealed 2x6 In-Wall Toilet Tank Carrier SystemIncluding a concealed tank. A durable adjustable height steel frame. A large flush actuator opening and foam Insulated tank to prevent sweating and noise, this in wall carrier is ideal for all wall hung toilet bowls. Length: 20, height: 45 adjustable, width: 6, in. installed on 2 in. x 6 in. studs behind the wall for thicker commercial walls Dual flush with high performance gravity offers you the choice of full or partial 0. 8 1. 28 gallon per flush