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, leak-proof fit. The kit fits most 3 in two-piece toilet tanks, but does not fit any Kohler toilets.