1、7075 Aviation Aluminum Alloy: The main body of the climbing pulley is made of 7075 aviation aluminum alloy, high strength, light weight, wear resistant.2、316 Stainless Steel Wheels: Climbing pulley's wheels are made of 316 stainless steel, strong and durable, corrosion resistant, and not easy to wear with steel cable friction.3、Superior Ball Bearing: Climbing pulley's ball bearing has high load capacity, excellent smoothness, safety and durability.4、Features: Climbing single pulley static tension is 20kN, rolling tension is 10kN, applicable rope diameter 8‑13mm/0.31‑0.51in.5、Unique Design: Circular hanging point design, used to hook the main lock, aperture diameter 15mm/0.61in, stable inner wall, effectively reduce rope wear. 6、With Steel Wire Rope: Heavy duty single rope pulley can also be used with wire rope, can be high speed rotation.