Package content: You will receive 100 pieces of plastic washers for screws and nails, enough for your daily use. Product size: The diameter of these plastic washers is 45mm and the hole in the middle is about 5mm. Product material: Our flat washers are made of polypropylene material, cold and heat resistant, high bearing capacity, good shock absorption effect, not easy to deform, good insulation and durable. Easy to use: round foam board washers are easy to repair with screws or nails, easy to install and easy to disassemble, and not easy to deform after loading. Wide use: these polypropylene washers are suitable for foam board, expanded polystyrene board, extruded polystyrene, plastic board Foam insulation, with good support and fixing effect. Note: Due to the difference between different monitors, there may be a slight color difference.