Size: The diameter of the pin inserted into the toilet seat is about 6mm (8mm bottom). The screw length is 47mm/1.9inch and the rubber fixing length is 40mm/1.6inch. Perfect Fit: These toilet seat accessories are equipped with expansion screws, which are stronger and more wear-resistant than other rubber plugs. They can perfectly fit the toilet holes without shaking. Easy to install: The toilet seat fixing hinge is easy to install, and the seat can be firmly fixed in just a few minutes. You can use it to repair the broken toilet lid, which is economical and practical. Material: The upper fixing part of this toilet seat is made of stainless steel and rubber. The surface of the toilet hinge is smooth, sturdy and does not rust. The plastic has excellent toughness, sturdiness, stability and durability. Wide Range Of Uses: The toilet seat hinge fasteners are specially designed for toilet mounting brackets, suitable for the most standard toilet seats and top fixing hinges. Product Description Features: -Suitable for 14-16mm hole ( expandable screw) for 2 toilet seats, universal uses. -Easy to replace without having to go under the seat. Specification: Material: steel stainless and rubber Net weight: 105g Package includes: 2 pairs of blind hole hinges universal expanding rubber nut screw with washer