KOHLER K-4775-33 Brevia with Quick-Release Hinges Round-front Toilet Seat, Mexican Sand Material:Plastic Color-matched plastic hinges Fits round front, one- and two-piece toilets L 16-5/8", W 14-3/16" Quick-Attach(TM) hardware for a fast and secure installation Quick-Release(TM) hinges allow the seats to be easily removed for cleaning