Three wave washers are made of a single of round-edged, pre-tempered flat wire from a continuous coil. This results in uniform diameters and wave heights. They replace conventional round wire springs when space is critical, typically occupying only 1/3 to 1/2 of the compressed height space. Features - Color: Black. - Size: 0.80X0.40X0.03cm/0.31X0.16X0.01 inch. - Material: Spring steel. - Three wave washers are a traditional sealing element. Spring washer vibrates against looseness with elastic force, good resilience and good integrity. - Assortment of washers for home, automotive, and shop use. - Washers are normally used to distribute loads of threaded bolts, screws and nuts evenly as the fastener is tightened. - It is used to prevent loosening and buffering. It needs good elasticity and impact resistance. - It is manufactured with technology to ensure the of the product and can work for a long time. Package list: 500 Washers