TOILET FLUSH VALVE KIT: Selectronic One-Piece Toilet Flush Valve Assembly Kit features sturdy plastic construction, a counterbalance style, and designed to function flawlessly DEPENDABLE DESIGN: Toilet Flush Valve Assembly Kit that is built to last with a sturdy plastic body and counterbalance style for flawless function and powerful flush EASY INSTALLATION: Assembly kit makes installation quick and easy with flapper, o-ring gasket, and mounting hardware VERSITLE: Selectronic One-Piece Toilet Flush Valve Assembly Kit is designed for use with one-piece toilets INCLUDES: One toilet flush valve assembly kit with flapper, o-ring gasket, and mounting hardware; Dimensions 5.4 in x 0.7 in x 9.8 in 3161 Series Flush Valve