High quality: zinc alloy hinge, rust-proof, antibacterial, zinc alloy hinge, silver plated surface, for MDF toilet seat, wooden toilet seat, resin toilet seat. < p>Corrosion resistance: Small screws are corrosion-resistant stainless steel, ideal for humid or low airflow environments. Washers and nuts: Washers and nuts: Rubber washers are a large and durable rubber mounting nut with limited space. Easy installation: This set comes complete with all fittings and should be installed easily, all you need is a screwdriver. Zinc alloy toilet lid can be used for a long time, no oxidation, corrosion, easy to clean. zinc alloy, rust-proof, antibacterial, electroplated surface is not easy to fall off. Perfect for use in bathrooms, hotels, public places, etc.