Universal Fit for Round Toilets: Designed to fit most American standard round toilets, measuring 15.9" long and 14.1" wide, mounting hole distance: 5.5". Please measure your toilet bowl before purchase. (Bowl size: length 16.3"-16.7", width 14.1", mounting hole distance 5.1"-5.9") Soft Close: Enjoy quiet in your bathroom with R&T slow close toilet seat, preventing slamming lid and fingers pinching. R&T round toilet seat also comes with grip-tight bumpers, ensuring stability as you use it. Easy Installation & Cleaning: Featuring top mount bolts for fast installation from above, eliminating the need to kneel down. Quick-detach design facilitates easy cleaning by quickly removing the lid. Heavy-Duty Construction: Crafted from heavy-duty PP material, R&T round toilet seat supports up to 400 lbs. Endures rigorous testing with 50,000 life cycles for durability and reliability. Serving US since 2002: R&T has served the U.S. with quality and reliability toilet repair kits for over 20 years. lf you ever have questions, our dedicated customer support team is always ready to help. R&T Round Toilet Seat for Standard Toilet Bowl Toilet Seat slow close for heavy people