MaterialThe Toilet Seat expander Bolt is made of high quality rubber, and the Screw is made of 304 Stainless steel. Not easy to rust, not easy to slip, not easy to break, long service life.Package Contains3 Pairs of Toilet Seat Fixings, Toilet Accessory Screws, Sturdy and Durable Toilet Seat Mounting Kit.SizeToilet Seat Screws are universal and suitable for openings of 14-18 mm. Suitable for most standard Toilet Seats with a top Hinge.Easy to InstallThe Stainless Steel Toilet Seat Hinges are easy to install. They are very easy to assemble done in minutes, simply remove old Bolts neatly around the area and mount the new bolts.Wide ApplicationToilet Seat screws are great for repairing or replacing Toilet seat and Toilet Lid. Please make sure the size is correct before purchasing.