Climbing Pulley Micro Single Pulley - 6 Pieces New, Unused My father (still alive) purchased these a few years ago (despite never having climbed), and for some reason, they were displayed on a shelf. They're more of an ornament, so I don't know much about the product itself. 【Material】 - Ultra-super duralumin, the strongest aluminum alloy, is used, making this climbing pulley excellent in strength, lightness, and durability. 【Breaking Strength】 - 20kN. The anodized treatment makes the aluminum pulley smooth, rust-resistant, and corrosion-resistant, ensuring long-lasting performance without degradation. 【Sophisticated Design】 - The semi-circular design of the head distributes the load evenly, providing better stability. 【CE Certification】 - The micro pulley is CE certified, ensuring safer use. It can be used with ropes with a diameter of 8-13mm, making it suitable for various systems, including Z-rigs. 【Applications】 - This compact pulley is essential for sports and industrial work applications, such as climbing, tree climbing systems, rescue, hauling, and transportation systems.