High quality: all products are made of durable, wear-resistant and corrosion-resistant nylon Graded cleanly: flat discs of any size are pre-graded for easy identification and avoid loss Each package contains different sizes - we contain 500 pieces in the most popular and popular sizes: M2 * 5 * 1: 100 pieces, M2.5 * 5 * 1: 100 pieces, M3*6*1: 100 pieces, M4*8*1:50 pieces, M5*10*1:50 pieces, M6*12*1.2: 50 pieces, M8*16*1.4: 1:40 pieces, M10 * 20 * 2:10 pieces With washers to increase contact surface, reduce pressure and protect parts and screws. Perfect for electrical connections on household and commercial appliances, automotive and marine applications. Premium Quality These black washers are made of high quality durable nylon, wear resistant, corrosion resistant and well insulated. Wide range of uses, at home or at work. Perfect for electrical connection to household and commercial appliances, automotive and marine applications. Well Classified Store: A total of 500 pieces in 8 different sizes Flat washers are pre-classified for easy identification and to prevent loss. The assortment box not only helps to sort the washers well, but also makes them easier to carry and store. > M2.5*5*1: 100 pieces M3*6*1: 100 pieces M4*8*1: 50 pieces M5*10*1: 50 pieces M6*12 * 1.2: 50 pieces M8*16*1.4: 1: 40 pieces, M10*20*2: 10 pieces