KOHLER K-23252-F Skim Dual-flush actuator plate for 2" x 4" in-wall tank and carrier systemMetal and glass form a beautiful bond to create the Skim wall hung dual flush actuator, and dual button control provides the user 0. 8 or 1. 6 gallons per flush. For use with the K 18829 2" x 4" in wall tank and carrier system Large flush actuator plate is easily removed, allowing access to inner tank and flush valve for service Dual flush actuator offers a choice of 0. 8 or 1. 6 gpf (3. 0 or 6. 0 lpf) Fingerprint resistant finish stays clean longer