Rock Climbing Wheel Aluminum Alloy 20KN Lightweight, Portable, Durable, Single, Fixed Rotary Disc . BLOCK SLIDE TO ZIPLINE 20KN BLACK Characteristic: 1. SAFE AND EFFICIENT: The efficient and smooth block is connected by two aluminum rivets, which effectively reduces rope wear and ensures the best service life. 2. LAYER PASS WHEEL: Concave pulley for surface treatment, using ball bearings, rolling smoothly, does not cause friction blocking. 3. STOP ALUMINIUM: Flywheel made of high strength aluminum alloy, light weight, easy to carry, heavy load 20 KN, safe to use. 4. APPLICABLE SCENARIOS: This block is great for a variety of activities such as rock climbing, mountain climbing, cave exploration and rescue, due to its compactness and durability. 5. LIGHT: Our block is ideal for climbers who need to cover long and steep distances due to the minimal frame and roller design. . BLOCK SLIDE TO ZIPLINE 20KN BLACK Specification: Item Type: Rock Climbing Disc Product Material: Aluminum Alloy Tensile force: 20KN Scene Application: Rock Climbing, Cave Exploration, Mountain Climbing, Rescue and Other Outdoor Activities . BLOCK SLIDE TO ZIPLINE 20KN BLACK List of packages: 1 x Pulley . BLOCK SLIDE TO ZIPLINE 20KN BLACK