Kohler K-4774-58 Brevia Elongated Toilet Seat with Q2 Advantage, Thunder Grey Quick-Attach Hardware for a fast and secure installation Quick-Release 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 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