No Slam Slow Close Toilet Seat. No-Slam slow close toilet seat technology features a slow closing hinge system that makes our easy close toilet seat SAFE and Slam-Free. Made of high-impact plastic this softclose toilet seat is resistant to fading, staining and cracking. Our soft close toilet seat features an ergonomic design that let’s you sit comfortably and safely. Adjustable hinges fit standard hole spacing sizes of 2 3/4 in. to 6 3/8 in. It is recommended to check measurements to be sure the item will fit with the brand toilet you have. Does not fit all round bowls. Easily removable hinges makes this slow close toilet seat easy to clean and maintain a higher standard of hygiene. Black Plastic Toilet Seat. Round Toilet Seat: seat measures 14 3/8 in. L x 13 1/4 in. W.