The Fluidmaster PRO Series was developed for the hard working plumbing professional who requires high quality, professional grade products that have been engineered for reliability and durability. The brand represents the most trusted professional toilet. Preferred by professional plumbers Water saving adjustable flush volumes on full and reduced flushes Fits 1 1/2in flush outlet Longer Cable length 550mm Dual flush button fits Top, Front or side applications Overflow height is adjustable from 8 1/2in to 13 1/2in Quick release cable/button connection eliminates cable damage Twist and release action enables simple maintenance Ideal for use in concealed behind the wall toilet cisterns.