brand new and high quality Features: High conductivity, corrosion resistant copper washer assortment, great for sump plugs, water, fuel and hydraulic fittings. Made of 304 stainless steel material. Sturdy and durable, great corrosion resistance for outside applications, easy to install. Flat washers are used to support and spread the load across the baring area of the bolt and nut to prevent pull through. Perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection. Flat Washers only, other accessories demo in the picture is not included! Specification: Material: Stainless Steel Sizes: M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Color: As Shown Quantity: 580 Pcs/set Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: M2-100pcs, M2.5-100pcs, M3-100pcs, M4-100pcs, M5-60pcs, M6-40pcs, M8-50pcs, M10-20pcs, M12-10pcs (without retail package)