Built tough to withstand the busiest bathroom, the MightyTuff Slow-Close Round Front Toilet Seat from American Standard has a firm, crush-resistant lid that supports 300 lbs. without flexing. Designed to fit most round front toilets, the MightyTuff toilet seat features quiet-close hinges to eliminate the noise of sudden slamming. This sleek, strong toilet seat is enhanced with sought-after features including an EverClean antimicrobial surface and the Ever-Tite locking system to stop side-to-side shifting. All mounting hardware is included. Fits most round-front toilets.