High quality: zinc alloy hinges, anti-rust, zinc alloy hinges antibacterial, zinc alloy hinge, silver plated surface, for MDF toilet seat, wooden toilet seat, resin toilet seat. < p>Corrosion resistance: the small screws are made of corrosion-resistant stainless steel, ideal for humid or low air circulation environments. Washers and nuts: Washers and nuts: rubber, Rubber washers are a wide and durable rubber mounting nut with limited space. Easy Installation: This set comes with all fittings and should install easily, all you need is a screwdriver. zinc alloy toilet can be used for a long time, no oxidation, corrosion, easy to clean. zinc alloy, rustproof, antibacterial, electroplated surface is not easy to fall off. Perfect for use in bathroom, hotel, public places, etc.