Features: 1. Heavy load, short stroke, small space required, easy to use in combination. 2. Easy to repair and replace, high economic security, suitable for precision heavy machinery with small space and large load. 3. Disc spring has a larger deformation energy per unit volume than other types of springs. Has good buffer shock absorption capacity. 4. With variable stiffness characteristics. 5. Often used as a strong buffer and shock absorber 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