Features: Prime Material: Made of top quality copper material, melting point up to 1083, fine workmanship, smooth surface, no burr. Good electrical conductivity and thermal conductivity Various Size: 280Pcs solid copper sump plug washer set,and there are 12 sizes Widely Usage: Great for sump plugs, water, fuel and hydraulic fittings.A sump plug washer set to suit all types of engines be it Car, Marine, Generators, Machinery and Plant Package: 280 Piece Flat Ring Copper Washer Assortment with convenient resealable plastic organizer for case. Tips: It can be faster to separate them using magnet Specifications: Material: Copper Size Types: 12 Box Size: approx. 210x106x29mm/8,27x4.17x1.14" Size: (I/D x O/D x Depth) M5x9x1 30 Pcs M6x10x1 30 Pcs M6x12x1 20 Pcs M8x12x1 30 Pcs M10x14x1 30 Pcs M8x14x1 20 Pcs M12x16x1 25 Pcs M14x18x1 25 Pcs M12x18x1.5 20 Pcs M16x20x1.5 20 Pcs M16x22x1.5 15 Pcs M20x26x1.5 15 Pcs Quantity: 280 Pcs/1 Set Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 280 x Copper Washers