1、Made of high quality stainless steel, it is of high hardness and good durability. 2、No deformation under great pressure. 3、Wear resistant and anti-corrosion, long service life. 4、Provides 8 sizes of flat washer for you to meet different requirements. 5、All washers is sorted and packed in a plastic case, convenient to carry and use. Features: 1. Made of high quality stainless steel, it is of  high hardness and good durability. 2. No deformation under great pressure. 3. Wear resistant and anti-corrosion, long service life. 4. Provides 8 sizes of flat washer for you to meet different requirements. 5. All washers is sorted and packed in a plastic case, convenient to carry and use.   Specification: Material: Stainless Steel Quantity: 170pcs Color: Silver Package Weight: Approx. 97g/ 3.4oz   Package list: 30 x M2*5* 0.3 30 x M 2.5*6* 0.5 30 x M3*7* 0.5 30 x M4*9* 0.8 20 x M5*10*1 20 x M6*12* 1.5 10 x M8*16* 1.5 10 x M10*20* 1.5 1 x Storage Case   Note: Due to the difference between monitors and light effect, the pictures may not reflect  the actual color of the item.