Features Buffer Shock Absorption: The deformation energy per unit volume of disc spring is greater than other types of springs. This disc spring has good cushioning and shock absorption capabilities. Variable Stiffness Characteristics: This compression spring has variable stiffness characteristics and can be used for precision heavy machinery with small space and large load. 7 Sizes: The clips fasteners assortment kit have a total of seven sizes of springs, this disc gasket can meet most of your daily needs. Easy to Storage: We have equipped this kit with a box, so that this disc washer assortment set can be convenient for you to store and carry. Wide Application: This washers assortment kit is often used as a strong buffer in heavy machinery, it is also a compacting device for clutches, safety valves, pressure reducing valves, etc Specification: Item Type: Disc Spring Material: Steel Color: As Pictures Show Size(cm/inch) Quantity: 8 * 4.2 * 0.4 / 3.1 * 1.7 * 0.16 20Pcs 10 * 5.2 * 0.5 / 3.9 * 2.0 * 0.2 20Pcs 12.5 * 6.2 * 0.7 / 4.9 * 2.4 * 0.28 20Pcs 14 * 7.2 * 0.8 / 5.5 * 2.8 * 0.31 20Pcs 16 * 8.2 * 0.9 / 6.3 * 3.2 * 0.35 20Pcs 18 * 9.2 * 1.0 / 7.1 * 3.6 * 0.39 20Pcs 20 * 10.2 * 1.1 / 7.9 * 4.0 * 0.43 20Pcs Package Size: 13 * 6.5 * 2cm / 5.1 * 2.6 * 0.8inch Package Weight: Approx. 143g Package List: 1 * Box of Disc Spring Package List