- High-Quality Material : Our washer kit is crafted from durable polypropylene, ensuring excellent insulation properties and a lightweight design. This material is resistant to wear, easy to grip, and offers long-lasting firmness. - Optimal Size : Each round plastic washer features a diameter of 1.77 inches with a center hole measuring 0.2 inches, making them perfectly compatible with standard screws. Weighing approximately 1.7 grams each, these washers are lightweight yet robust. - Generous Quantity : The set includes 100 polypropylene washers, providing you with ample supply for regular installation or replacement needs. This ensures you have the necessary components on hand for multiple projects. - Versatile Applications : These plastic flat washers are ideal for securely fixing and supporting rigid foam insulation boards. Use them for a variety of projects, including: - Attaching insulation foam boards in wall constructions. - Fixing expanded polystyrene or extruded polystyrene boards for effective energy efficiency. - Supporting new foam board installations in both residential and commercial applications. - Reliable Performance : Designed for everyday use, these washers provide the stability needed for various insulation materials, ensuring effective installation and long-term durability in your construction projects.