[Specifications] An indispensable partner for safety ziplines. The 5.4-foot spring brake helps reduce impact force at the end of the rope, suitable for applications such as steel cable rigging and cargo lifting. Offers excellent stretching and rebound performance. Rubber head size is 7 x 4 x 4 cm. [Extension Spring] The zipline spring brake features a 5.4-foot spring, longer than most similar products on the market. Provides a longer effective deceleration distance for improved and smoother deceleration. [Flexible and Durable] Constructed from stainless steel, offering superior tensile resistance compared to standard stainless steel of the same size. Resists rust and built to last. Multiple forging processes and strict quality control ensure extended service life. [Special Silica Gel Buffer Plug] Star-shaped soft plug made of silica gel provides flexibility and helps prevent damage to other components. Advanced manufacturing process ensures consistent performance. Uniform spring pitch, clear texture, and fine craftsmanship contribute to stable 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 Head Note: Light shooting and different displays may cause slight color variations between the image and actual item. Measurement allows an error of +/- 1-3 cm.