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 runs and cargo lifting. Offers excellent performance in stretching and rebounding. 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 a greater effective deceleration distance. Delivers improved and smoother deceleration performance. Flexible and Durable: Constructed from stainless steel, offering superior tensile strength compared to standard stainless steel of the same size. Resistant to rust and built to last. Multiple forging processes and strict quality control ensure a long service life. Special Silica Gel Buffer Plug: Star-shaped soft plug made of silica gel provides flexibility and helps prevent damage to other components or breakage. High-quality manufacturing ensures consistent performance. Uniform spring pitch, clear texture, and precise craftsmanship deliver 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: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allowance is +/- 1-3 cm.