Material: The toilet seat screw rod and washer are made of durable carbon steel and plated with colored zinc. The nut is made of POM plastic and the sealing ring is made of rubber. Size: The toilet lid screw rod is 74mm long and its diameter is 8mm. The diameter of the washer and nut is 22mm. The toilet seat fittings and accessories are perfectly designed for all split toilets, ensuring compatibility with most toilet models. Easy to Install: The toilet seat screws are easy to use. Simply insert the POM plastic nut into the designated hole, place the washer and tighten the bolt by hand. The whole process does not require any tools. Product Packaging: The toilet seat fixing screw kit includes two screw rods, two plastic nuts, two rubber gaskets and two washers, providing everything you need for a sturdy and reliable installation. Quality Assurance: Each component of the hinged toilet seat fixings is rigorously tested to meet the highest standards of durability and performance. So you can use it with confidence.