Material: 304 stainless steel for durability and corrosion resistance. Precise size: Wire diameter 0.5 mm (0.02 in), outer diameter 4 mm (0.16 in), length 80 mm (3.15 in). This size combination provides a strong, secure fit for a variety of applications and dependable performance. Strength and elasticity: End anchors include strong hooks and loops; loops at both ends provide firm attachment points. The spring delivers a uniform pulling force and reliable resilience under tension. Wide application range: Suitable for electronics, tools, toys, construction, and machinery. Widely used across industries such as manufacturing, research, automotive, and aerospace. A versatile component for both commercial and projects. Why you need it: A quality tension spring that combines precise dimensions, durable material, and dependable performance for reliable actuation and tensioning in diverse assemblies. Use scenarios: Electronics and small devices: use as a compact tension element for latching or cable management. Tools and toys: provide toposition force or retractable features in hand tools or play items. Automotive or machinery: serve as a simple tensioning or mechanism in assemblies requiring consistent force.