This comprehensive 600-piece washer set includes red fiber insulation rings in various sizes from M10 to M32, perfect for professional and DIY applications. The flat washers come organized in a convenient storage case with labeled compartments for easy size identification and access. Made from durable steel paper fiber material, these washers provide reliable insulation and spacing capabilities in mechanical assemblies. The set includes common metric sizes M10, M12, M16, M20, M22, M25, and M32, making it versatile for different fastening needs. These washers serve as excellent spacers and seals in various mechanical applications where insulation properties are required. The bright red color makes them easily distinguishable from standard metal washers. The organized compartment system helps prevent mixing of different sizes and ensures you can quickly find the exact washer size needed for your project. This comprehensive set is an essential addition to any mechanic's or DIY enthusiast's toolkit.