[Specifications] An indispensable safety component for ziplines. The 5.4-foot spring brake helps reduce impact force on ropes, suitable for applications such as steel cable rigging and cargo lifting. Offers excellent stretching and rebound performance. Rubber head size: 7 x 4 x 4 cm. [Extension Spring] This zipline spring brake features a 5.4-foot spring, longer than most similar products on the market, providing an extended effective deceleration distance. Enhanced deceleration performance for smoother operation. [Flexible and Durable] Constructed from stainless steel for superior tensile strength compared to standard stainless steel of the same size. Resistant to rust and built for durability. Reinforced through multiple forging processes and strict quality control to ensure a long service life. [Special Silica Gel Buffer Plug] Star-shaped soft buffer plug made of silica gel provides flexibility, helping to prevent damage to other components and reducing the risk of breakage. Uniform spring pitch, clear texture, and precise craftsmanship ensure consistent and reliable resilience. [Easy to Install] No tools required. Simply thread the cable through the green star-shaped silicone plugs at both ends. Color: As shown Material: Stainless steel + rubber Size: Total length 165 cm, spring outer diameter 2.5 cm Package Contents: 1 x spring, 2 x silicone heads Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3 cm.