[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 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 performance. [Flexible and Durable] Constructed from stainless steel, offering high tensile strength and resistance to rust. Durable design ensures a long service life. Multiple forging processes and strict quality control enhance reliability. [Special Silica Gel Buffer Plug] Star-shaped soft plug made of silica gel provides flexibility and helps prevent damage to other components. Uniform spring pitch, clear texture, and fine craftsmanship ensure 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 and display differences may cause slight color variation between the image and actual item. Measurement allows an error of +/- 1-3 cm.