General description The 2-piece expansion screws set is designed for securely fastening toilet seats. Made from durable materials, this set ensures a long-lasting solution for your toilet lid installation. Technical specifications Material: Stainless steel and high-quality nylon Screw size: 4.8 x 0.5 cm Nylon stretch nut size: 3.7 x 1.7 cm Washer diameter: 14 mm Other information Please confirm whether the size is suitable before purchasing.