FITS ALL TOILETS: This seat fits square shape toilet bowls (400 mm to 440 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: 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, inc