High-quality material: The screw is made of stainless steel and the expansion nut is made of rubber. The high-quality material makes the toilet seat fixing device anti-corrosion, not easy to age and become brittle. Size: The toilet replacement kit includes three pairs of different sizes, which fit almost all toilets. Please refer to the picture for the specific size. Easy to use: Screw the universal toilet seat hinge into the top hole of the toilet lid, and then tighten it until the toilet lid is no longer loose. Function: The universal toilet seat expansion nut is used to fix the toilet lid. The toilet seat with its back against the wall or fixed to the wall can be fixed with a toilet seat hinge screw. Specifications: Material: Rubber, Stainless Steel Color: Black, White Quantity: Three Pairs Size: Small Black: Screw: 47mm Rubber Tube Nut: 40mm Large Black: Screw: 71mm Rubber Tube Nut: 61mm White: Screw: 44mm Rubber Tube Nut: 37mm Features: The toilet replacement kit includes a total of 6 toilet lid screws, which is enough for daily use in the family. The toilet seat screw fixing device is suitable for most toilet lids. The high-quality material ensures that the universal toilet seat hinge is corrosion-resistant, not easy to age, and does not become brittle. Package includes: 3 pairs of expansion screws and accessories Tip: Please confirm the size before purchasing