KOHLER K-4774-96 Brevia Elongated Toilet Seat with Quick-Release Hinges and Quick-Attach Hardware for Easy Clean in Biscuit Materials: Solid polypropylene plastic to resist staining, chipping, and fading. Color-matched plastic hinges. Quick-Release hinges allow seat to be unlatched from toilet for easy removal and convenient cleaning; no tools required. Quick-Attach hardware for fast and secure installation. Contoured seat for user comfort. Elongated closed-front. Dimensions: 18.6 x 14.2 x 0.8 in. Quick-Attach(TM) Hardware for a fast and secure installation Quick-Release(TM) hinges allow the seats to be easily removed for cleaning Fits elongated, one- and two-piece toilets Engineered to ensure a proper fit with clean lines to complement toilets of many different designs Made of solid polypropylene and is resistant to staining, fading, chipping and peeling