Premium MaterialThe 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 useThe nylon washer can reduce friction, prevent leakage, prevent falling, and increase the contact area of the screw or nut with the workpiece surface to prevent the surface of the part from wearing out. Easy to store 8 sizes of flat O-rings 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, household appliances, warehouses, pumps, drain plugs, etc. What you get You will receive a total of 500 washers, 8 common sizes, in sizes M2, M2.5 , M3, M4, M5, M6, M8, M10, which are enough for your daily use. M2*5*1 nylon spacer:100pcs M2.5*5 * 1 nylon spacer:100pcs M3 * 6 * 1 nylon spacer:100pcs M4 * 8 * 1 nylon spacer:50pcs M5 * 10*1 nylon spacer:50pcs M6*12*1.2 nylon spacers:50pcs M8*16*1.4 nylon spacers:40pcs M10 *20*2 nylon spacers:10pcs