MC nylon pulley has the self-lubrication and is softer than metal, which can make deformation in a certain degree when the pulley contacts the cable. This can enlarge the contact area and reduce the maximum contact pressure.
As the deformation of the pulley will reduce the cable distortion and the fiiction in cables, the cables can be protected and used for longer.
MC nylon pulley has good corrosion resistance and will not rust in the rain and the moisture, which can ensure the best lubrication for the cables in the ditch.