The ULTRALEGERE is a simple nylon sheave that can be installed on a carabiner.Size and weight reduced to an absolute minimum to the make lightest pulley availableFor use with a symmetrically shaped carabiner with rope no thicker than 13 mm in diameterRope diameter: 7-13 mmWeight: 10 gMade in FranceMaterial: nylonWorking load: 1 kN