Features The washer rings is Made of stainless steel material, They have good electrical conductivity and thermal conductivity.good corrosion resistance. There are 5/10/20/30/50/100 pieces spring washer flats for your choice. Ten kinds spring washer flat, M3, M4, M5, M6, M8, M10, M12, M14, M 16 and M20.so that meets your different needs in the work. The washer flat Suitable for electrical connections of domestic and commercial appliances, automotive and marine applications Brand new and high quality.Made of high quality aluminum ensures the long life. Features: 1. The washer is Made of stainless steel material, good corrosion resistance. 2. There are 5/10/20/30/50/100 pieces spring washer flats for your choice. 3. Ten kinds spring washer flat, M3, M4, M5, M6, M8, M10, M12, M14, M 16 and M20. Specification: Model: DIN9250 Material: Stainless Steel Optional Style: 100Pcs M3, 100Pcs M4, 100Pcs M5, 100Pcs M6, 50Pcs M8, 30Pcs M10, 30Pcs M12, 20Pcs M14, 10Pcs M 16, 5Pcs M20 Weight: Approx. 7-35g / 0.2-1.2oz Package List: 100Pcs, 50Pcs, 30Pcs, 20Pcs, 10Pcs, 5Pcs Lock Washers(based on your choice) Package List