[Specifications] Essential for safety ziplines, this 5.4-foot spring brake minimizes impact on the rope, ideal for steel cables and cargo lifting. Offers superior stretch and rebound performance. Rubber head dimensions: 7 x 4 x 4cm. [Extension Spring] This 5.4-foot zipline spring brake is longer than most, providing an extended deceleration distance and improved performance. [Flexible and Durable] Constructed from stainless steel for enhanced tensile strength and durability, this zipline spring brake resists rust. It undergoes rigorous forging and quality checks for a longer lifespan. [Special Silicone Buffer Plug] The flexible star-shaped silicone plug prevents damage to other parts and ensures excellent performance thanks to precise manufacturing. Each spring has a uniform pitch and clear texture for reliable resilience. [Easy to Install] Installation is tool-free; simply thread the cable through the silicone plugs at both ends. Color: As shown Material: Stainless steel + rubber Size: Total length 165cm, spring outer diameter 2.5cm Package Includes: 1 x Spring 2 x Silicone Heads Note: Package contains only the listed items. Colors may vary slightly due to lighting and display differences. Measurement error range: +/- 1-3cm.