[Specifications] A safety accessory for ziplines. The 5.4-foot spring brake helps reduce impact force at the end of the rope, suitable for applications such as steel cable setups and cargo lifting. Offers excellent stretching and rebound performance. Rubber head size is 7 x 4 x 4 cm. [Extension Spring] This zipline spring brake features a 5.4-foot spring, longer than many 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. Built to last with enhanced durability. Multiple forging processes and strict quality control ensure extended service life. [Silica Gel Buffer Plug] Features a star-shaped soft plug made of silica gel that is flexible and helps protect components from damage. Precision manufacturing ensures consistent performance. Uniform spring pitch and clear texture contribute to 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 tolerance is +/- 1-3 cm.