High quality: zinc alloy hinges, rustproof, antibacterial, zinc alloy hinge, silver plated surface, for MDF toilet seat, wooden toilet seat, resin toilet seat. 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, The rubber washers make a large, durable rubber mounting nut with limited space. Easy Installation: This set comes complete with all fittings and should install 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, rustproof, antibacterial, electroplated surface is not easy to fall off. Perfect for use in bathroom, hotel, public places etc. Replacement hinges: No need for a new toilet seat Any time a hinge is broken, replace simply by this set which includes all the accessories. Compatible with:Very good for broken or old toilet seat hinges, suitable for most