General description These 4 Pcs Toilet Seat Hinge Fixings are designed to provide a sturdy and reliable solution for securing your toilet seat. Made from high-quality materials, they are ideal for replacing worn-out or ineffective plastic inserts that often come with new toilet seats. This set includes two pairs of fixing screws, ensuring compatibility with most standard toilet seats that feature top fixing hinges. Technical specifications Black expansion ball diameter: 1.8 cm (unexpanded state) Length of screws: 4 cm White screw size: 4.5 x 0.5 cm Nylon expansion nut size: 3.7 x 1.8 cm Washer diameter: 1.4 cm Material: Rubber, ABS, Stainless Steel, Nylon Quantity: 2 Pairs/4 Pcs Installation Insert the rubber nut into the holes first. Insert the screws through the washer and plastic plate into the rubber expansion nut. Tighten the screw and cover the stainless steel base. Align the spindle and insert it into the hole of the toilet lid. Usage These fixing screws are perfect for replacing plastic inserts that come with new toilet seats. They fit most standard toilet seats with top fixing hinges, accommodating holes of 14-18 mm. When tightening the bolts, ensure not to over-tighten to avoid pushing through the washer. Other information The detailed size of each toilet seat nut is available in the product image. Please measure before purchasing to ensure compatibility with your toilet seat.