[Specifications] An indispensable partner for safety ziplines. The 5.4-foot spring brake helps reduce impact force on the rope, suitable for applications such as steel cable rigging and cargo lifting. Offers excellent performance in stretching and rebounding. Rubber size: 7 x 4 x 4cm. [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 performance. [Flexible and Durable] The zipline spring brake is constructed from stainless steel, offering superior tensile strength compared to standard stainless steel of the same size. Resistant to rust and corrosion. 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 or breakage. Precise manufacturing ensures consistent performance. Uniform spring pitch, clear texture, and fine 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 165cm, spring outer diameter 2.5cm Package Contents: 1 x Spring 2 x Silicone Plug Note: Light and display differences may cause slight color variation between the image and the actual item. Measurement allowance: +/- 1-3cm.