Material: The expansion nut is made of high quality stainless steel and nylon, which is used to fix the toilet lid and is durable. Set: The expansion nut set expansion contains 2 × stainless steel screws, 2 × nylon expansion nuts and 2 × metal washers. Screw size: 4.8 * 0.5 cm. Nylon expansion nut size: 3.8*1.4cm. Washer diameter: 14mm. Warm reminder: Please confirm whether the size is suitable before purchasing. If you have any questions about our products, please contact us and we will do our best to help you. Delivery quantity: 1 pair / 2 pieces Welcome to meet