MAYFAIR 1583SLOW 006 NextStep Elongated Closed Front Toilet Seat, Bone Built in potty seat whisper close easy clean & change sta-tite seats fastening system. This obsolete 1583SLOW 006 has been replaced with bemis 1583SLOW 006 1483Slow Easyclean & change hinge allows for seat to be completely removed from the bowl for easy cleaning Whisperclose hinge slowly and quietly closes eliminating slamming and pinched fingers Sta-tite seat fastening system never loosens and installs with ease Child seat removes when no longer needed or for easy cleaning