Featuring a versatile flat design, these polypropylene washers are perfect for fixing and supporting rigid panels. Their smooth surface minimizes wear and tear during installation, while their robust material ensures performance. Ideal for insulation applications, they provide dependable fastening for screws and nails. Features -Color:White -Material:Plastic -Size:4.50X4.50X0.50cm/1.77X1.77X0.20in -Load distribution efficiency: prevents localized pressure from screws on rigid foam boards, significantly extending their lifespan. - insulation: constructed from polypropylene, offering excellent insulation properties, perfect for electrical installations and maintenance, ensuring safety. -Multisize fit: 45mm design fits various foam board specifications, widely used in building insulation projects, enhancing construction efficiency. -Ease of installation: lightweight plastic material makes installation easy, reducing construction burden and suitable for quick fixing and support. -Robust durability: wearresistant and antiaging, maintaining stable performance even in harsh environments, ensuring longterm structural stability. Package list: 300pcs plastic insulation gasket