[Specifications] An indispensable safety component for ziplines. The 5.4-foot spring brake helps reduce impact force at the end of the cable, suitable for applications such as steel cable setups 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 comparable models, providing an extended effective deceleration distance. Enhanced deceleration performance for smoother operation. [Flexible and Durable] Constructed from stainless steel, offering superior tensile strength compared to standard stainless steel of similar dimensions. Resists rust and built to last. Multiple forging processes and strict quality control ensure a prolonged service life. [Special Silica Gel Buffer Plug] Star-shaped soft silica gel plug provides flexibility and helps prevent damage to connected components. Advanced manufacturing ensures consistent product performance. Uniform spring pitch, clear texture, and precise craftsmanship deliver reliable resilience. [Easy to Install] No tools required. Simply thread the cable through the green star-shaped silicone plugs on 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 Only the above package content is included; other items are not part of this package. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allowance: +/- 1-3 cm.