Material: 304 stainless steel. Precise size: Each spring has a wire diameter of 1.6 mm (0.063 in), an outer diameter of 18 mm (0.71 in), and a length of 200 mm (7.87 in). This exact sizing provides a strong, secure fit for a range of applications and dependable performance. Strength and elasticity: Equipped with strong hooks at both ends for firm attachment points and a uniform pulling force for consistent operation. The spring's elasticity delivers resistance and reliable resilience under tension, suitable for tough tasks. Wide application range: Ideal for use in electronics, tools, toys, construction, and machinery. Widely used across manufacturing, research, automotive, and aerospace industries. Their versatility makes them suitable for both commercial and projects. Use scenarios: Electronics enclosures or equipment housings that require a reliable action or positive latch. Small levers, lids, or covers on tools or machinery that need consistent tension and secure attachment. Panel latching or trim retention in automotive interiors or aerospace applications where firm attachment and elastic resistance are needed.