【Premium Material】 The round washer is made of excellent nylon material with smooth edges, which has excellent insulation, heat insulation, corrosion resistance, sturdiness and long service life. 【Easy to 【Use】 The nylon washer can reduce friction, prevent leakage, prevent falling off, and increase the contact surface of the screw or nut with the surface of the workpiece to prevent the surface of the workpiece from wearing out. 【Easy to Store】 8 sizes of flat sealing washers are packed in a transparent plastic storage box. Pre-classification for quick identification and protection against loss. Very convenient to use. 【Wide Applications】 Perfect for electrical connections to household and commercial appliances, automotive and marine applications such as workshops, industrial maintenance, automobiles, doors, windows, appliances, warehouses, pumps, drain plugs, etc. 【What You Get】 You will receive a total of 500 nylon washers, 8 common sizes, in sizes M2, M2.5, M3, M4, M5, M6, M8, M10,