[Specifications] An indispensable safety component for ziplines. The 5.4-foot spring brake helps reduce impact force on ropes, suitable for applications such as steel cable rigging 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 performance. [Flexible and Durable] Constructed from stainless steel, offering high tensile strength and resistance to rust. Designed for durability with enhanced performance compared to standard stainless steel of similar dimensions. 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 prevent damage to other components. Uniform spring pitch, clear texture, and fine craftsmanship ensure consistent and 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 actual item. Measurement error allowance: +/- 13 cm.