[Specifications] An indispensable accessory for zipline safety. 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: 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 and long service life, enhanced through multiple forging processes and strict quality control. [Silica Gel Buffer Plug] Features a star-shaped soft plug made of silica gel that is flexible and resistant to damage or breakage. Ensures protection of connected components. Uniform spring pitch, clear texture, and fine craftsmanship contribute to consistent 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 the actual item. Measurement allowance: +/- 1–3 cm.