High quality: All products are made of strong nylon, corrosion and wear resistant Flat discs of any size are pre-graded for easy identification and to prevent loss Each package contains different sizes - We have 500 pieces in the most common sizes: M2 x 5 x 1: 100 pieces, M2.5 x 5 x 1: 100 pieces, M3 x 6 x 1: 100 pieces , M4 x 8 x 1: 50 pieces, M5 x 10 x 1: 50 pieces, M6 x 12 x 1.2: 50 pieces, M8 x 16 x 1.4: 1: 40 pieces, M10 x 20 x 2: 10 parts With washers to increase contact surface, reduce pressure and protect parts and screws. Perfect for electrical connections to household and commercial appliances, automotive applications and marine. Product Description Premium Quality These black flat washers are made of high quality durable nylon material, resistant to wear, tear and corrosion and good insulation. Wide range of uses around the home or business.Perfect for electrical connections to household and commercial appliances, automotive and marine applications. Attention: The material