15 Sizes All include 225pcs metric washers with sizes M3x15, M4x20, M4x25, M5x20, M5x25, M6x20, M6x25, M6x30, M8x20, M8x25, M8x30, M10x20, M10x25, M10x30, M12x24. High Quality Material All washers are made of 304 stainless steel, which has good corrosion resistance in bad environment like high temperature, cold and high humidity. They have superior rust resistance and excellent oxidation resistance. Easy to Use The metal washers are very easy to install, the surface of the washing machine is smooth and can reduce friction between fasteners, prevent leakage, insulate, prevent loosening or dispersion of pressure. Package Contents The washers are arranged in a storage box so that you can easily find the set and avoid losing them if necessary. Wide Range of Applications Perfect for electrical connections on household and commercial appliances, automotive and marine applications. 225 pieces flat washers, stainless steel round washers and lock washer assortment M3 M4 M5 M6 M8 M10 M12 washers nuts for general industrial maintenance! Properties: - These washers are made of 304 stainless steel, are highly resistant to rust and oxidation and last a long time! - The surface of the washer is smooth enough to reduce friction between fasteners, prevent leakage, insulate, prevent loosening or pressure dispersion. - The larger outer diameter is suitable for both indoor and outdoor use, and is perfect for applications that require greater pressure distribution, such as: B. drywall, fences, light fixtures and sheet metal. Specification: Material: 304 Stainless Steel Type: Flat Washers Product Color: Silver Size: M3 15*0.8mm (30pcs) M4 20*1.2mm (20pcs) M4 25*1.5mm (10pcs) M5 20*1.2mm (30pcs) M5 25*1.5mm (10pcs) M6 20*1.5mm (15pcs) M6 25*1.5mm (10pcs) M6 30*1.5mm (10pcs) M8 20*1.5mm (20pcs) M8 25*1.5mm (10pcs) M8 30*1.5mm (10pcs) M10 20*1.5mm (20pcs) M10 25*1.5mm (10pcs) M10 30* 1.5mm (10pcs) M12 24*1.5mm (10pcs) Package Content: 225 x Steel Discs with Box (15 Sizes)