DescriptionThis item is spiral springs that offer resistance to a tension force, or load, applied along the axis of the spring. When a load is placed on an extension spring, making it longer, the spring pulls back against the load to return to its original length. These springs are used in a variety of applications, including automotive engines, major appliances, medical devices, electronics, and sensitive measuring instruments.Features- Color: As shown. - Material: Metal. - Box Size: Approx. 21 x 11 x 3cm. - Great resilience and for durable use. - Greater resistance to corrosion. - Used for automotive engines, major appliances, medical devices, electronics, and sensitive measuring instruments.