The adjustable 3 in flush valve and tank to bowl gasket kit fits specific toilet models made after 1997. The toilet repair kit is quick and easy to install, the flush valve height easily adjusts from 7 to 11-1/2 in, with no tools or hack sawing required. The oversized tube and funnel reduce flood risk while the included premium flapper and tank to bowl gasket ensure a tight, leakproof fit. The kit fits most 3 in two piece toilet tanks, but does not fit any Kohler toilets. Easy to install.