Built-in Soft-close Hinge System: The toilet seat and lid features Gentle Closing: seat and lid lower slowly to avoid loud slamming. Safety: protects against finger pinching and accidental bumps. Durability: reduces wear and tear on the seat and toilet bowl Fits Round Toilet Bowls: This round toilet seat cover is compatible with TOTO/Kohler/Gerber/American Standard/Crane/Eljer/Caroma, and more, replaceable for most standard round toilet seats; Toilet seat length 16.5 inches; Mounting hole distance 5.5 inches; Please make sure your toilet is round-shaped before purchasing High-Impact Gloss Polypropylene: Constructed with solid polypropylene material and includes rubber pads for better stability, more sanitary, stain resistant; The toilet seat can effectively resist dirt and won't be oxidized or faded in decades Two Types of Screw Accessories: Included all installation hardware: fix it from the bottom with a white plastic screw or from the toilet top with a black insert expansion metal bolt; We also provide two rubber pads to protect the hinge from slipping Humanity Design: Great for households seeking a long-lasting, quiet, and easy-to-install toilet seat compatible with most elongated models. The stain-resistant material and soft-close hinge make it a practical choice Universal Elongated Round Toilet Seat Replacement