Product Description: Product Size: M4 M5 M6 M8 M10 M12 Product material: A2/304 stainless steel System: Metric system Product Features: Widely well suited with screws, nuts and bolts of a similar size, with a strong load-bearing surface that forestalls the nut/bolt head from tearing the material Available in 6 various sizes to meet all of your needs in terms of dispersing the load of screw fixingSturdy plastic case for easy storage and organization of commonly used screws in 6 diversified sizes The product is manufactured from 304 stainless steel, which has good corrosion and oxidation resistance and warmth resistance, high strength and high toughness 790 Pcs Set : Spring Washers M4 120 PCSSpring Washers M5 one hundred PCSSpring Washers M6 80 PCSSpring Washers M8 50 PCSSpring Washers M10 30 PCSSpring Washers M12 15 PCS Flat Washers M4x9x0.8mm a hundred and twenty PCSFlat Washers M5x10x1mm a hundred PCSFlat Washers M6x12x1.6mm 80 PCSFlat Washers M8x16x1.6mm 50 PCSFlat Washers M10x20x2mm 30 PCSFlat Washers M12x24x2.5mm 15 PCS