●FITS ALL TOILETS: This seat fits all square shape toilet bowls (420 mm to 480 mm). ●PERFECT FIT: This seat has front to back adjustable for the perfect seat to toilet bowl. ●EASY INSTALLATION: This square toilet seat comes with top fitting. Top fixing tight tightens from the top to make installation easier. ●NO SLAMMING: Toilet Seat closes slowly and quietly with a tap to eliminate pinched fingers. ●EASY CLEANING ? Its QUICK RELEASE function allows you to remove the seat by just clicking buttons and you can clean your toilet thoroughly, including the nasty area between the hinges.