0.8/1.28 GPF 2 ft. x 4 ft. Concealed Dual Flush in Wall Toilet Tank Carrier for Back to Wall Toilet in WhiteInstalled on 2 in. x 4 in. studs behind the wall for thinner residential walls Dual flush with high performance gravity offers you the choice of full or partial 0. 8 1. 28 Gal. per flush (GPF) Large flush actuator plate opening can be removed for easy access to the inner tank and speedy valve Adjustable installation allows fitting to most any bathroom project Features Item Weight 8. 2 Included Complete Kit Flushing Technology Gravity Fed Flushing Type