Features:This pulley is constructed with premium aluminium alloy, anti-rust, high strength and durable. Heavy duty, it can withstand about 26KN pull strength, the side plates can prevent rope from skidding, super reliable for keep your safety in climbing. Fine polish ensures sleek surface, providing smooth and quick rotation to greatly reduce friction. The small hole is 12mm, the large hole is 14mm, suitable for rope with diameter under 12mm. Perfect for climbing, also excels great in other uses like hauling, transporting, etc. Specification:Material: Aluminium alloyColor: orange, blue, black (optional)Pull Strength: Max. 26KNSize: Approx. 8.1*4.4cm / 3.2*1.7inHole Diameter: Approx. 12-14mm / 0.47-0.55inWeight: Approx. 102gPackage List:1 x Pulley.