The single sheave aerial roller is a gravity die casted aluminium alloy sheave, which is mounted on sealed ball bearings and groove lined with neoprene / natural rubber compound flap (Shore hardness 60-ÃÂ70 shore A with minimum thickness at bottom of the groove of 6.5 mm & tensile strength of 130-200 kg/cm2) for conductor protection. It is mounted on a fixed steel frame with standard plate attachment. It is fit for stringing overhead conductors.