[Specifications] An indispensable safety component for ziplines. The 5.4-foot spring brake helps reduce impact force at the end of the line, 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. Provides a longer effective deceleration distance, resulting in improved and smoother deceleration. [Flexible and Durable] Constructed from stainless steel, offering high tensile strength and resistance to rust. Designed for durability and long service life, enhanced by multiple forging processes and strict quality control. [Special Silicone Buffer Plug] Star-shaped soft plug made of silicone provides flexibility and helps prevent damage to other components. Uniform spring pitch and clear texture ensure consistent performance. Precision craftsmanship for reliable 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 tolerance: +/- 1–3 cm.