Thank you for viewing! The following is quoted from the sales site: Azarxis Climbing Pulley Micro Pulley Rope Pulley Climbing Petzl Arborist Pulley Mountaineering Rescue Rigging Traction [Material] The double pulley uses a 7075 aviation aluminum alloy for the main body shell, which is high-strength and lightweight, and has excellent impact resistance. The pulley part is made of stainless steel, which is resistant to rust and durable for long-term use. [Strength] Breaking strength: 30kN, suitable for 13mm diameter rope or 12mm cable, suitable for various usage scenarios. [Dimensions] Width 10.8cm, length 8cm, weight 280g. Compact size, fits in your hand, and is convenient to keep in your backpack. [Advantages] The "concave" shaped ball of the micro pulley can reduce friction with the rope, allowing the pulley to rotate smoothly. The double roller design achieves both anti-twist and high transmission efficiency. [Great活躍] CE certified pulleys can save physical strength and improve efficiency in mountaineering, climbing, high-altitude rescue, home gym fitness lift pulley systems, rescue, exploration, and luggage transportation. *This item is a beautiful/unused item. Although we have confirmed it, there may be inconspicuous minor deterioration even if it is a new, unused item due to being stored at home. Thank you for your understanding. If there is a problem, please contact us via transaction message before evaluating the receipt. ☆ Immediate purchase is welcome ☆ We plan to ship via Mercari ☆ Please note that the time slots for checking/replying to comments vary depending on the day.