Material: The expansion nut is made of high quality stainless steel and nylon, which is used to fix the toilet lid and is durable. Game: The game of expansion nuts contains 2 × stainless steel screws, 2 × nylon expansion nuts and 2 × metal washers. Screw size: 4.8 * 0 .5 cm. Nylon expansion nut size: 3.71.7cm. 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. Product Description * Specifications: Material: stainless steel + nylon Weight: 20g Stainless steel screw size: 4.80 .5cm Nylon expansion nut: 3.7*1.7cm Diameter of the washer: 14mm Color: silver+white Package included: 2 × nut set expansion Due to the angle of photography and light, there may be a slight color difference between the photo and the product , please refer to the actual product.