Material: 304 stainless steel. This material provides durability and corrosion resistance. Precise size: Wire diameter 1.8 mm (0.071 in), outer diameter 20 mm (0.79 in), length 130 mm (5.12 in). This exact size combination ensures a strong, secure fit for various applications and dependable performance. Strength and elasticity: Equipped with strong hooks and a uniform pulling force. The loops at both ends provide firm attachment points, while the spring's elasticity offers powerful resistance and reliable resilience under tension. Wide application: Used across electronics, tools, toys, construction, and machinery. Widely used in manufacturing, research, automotive, and aerospace projects. Its versatility makes it suitable for both commercial and projects. Use scenarios: In electronics enclosures or devices requiring a consistent force. In automotive or machinery assemblies needing a durable tension component for levers, latches, or cables. In toys or hobby projects and small constructions where durable, repeatable tension is needed.