High Quality The Flat Washers Are Made of Stainless Steel With A Layer of Anti-Rust Coating, The Flat Washers Are High Temperature Resistant, Not Easy to Rust, Safe And Durable. Widely Used Perfect for Electrical Connections On And Commercial Appliances, Automotive And Marine Applications. High Precision M10F, M8F, M6F, M5F, M4F, M3F, M2.5F, M2F / S, M2.5S, M3S, M4S, M5S , M6S, M8S, M10S High Precision Flat Washer Set, 700Pcs In total. Wide Functions The Flat Washer Can Be Applied to Disperse The Pressure from The Bearing Surface of The Fastener Such As Bolts to Protect The Surface of The Connected Part, Besides, It Can Reduce Friction, Prevent Leakage, Insulate, Prevent Loosening And More. Good Service We Will Provide High Quality Products. Quality And Enthusiasm for Service Our Customers, If You Have Any Questions, Please Do Not Hesitate to Contact Us.