This 500mm Track Shoe is listed for the Caterpillar 311E. Built with a high-quality rubber blend, reinforced steel carcass, and high-tensile cords, it delivers stability and long service life in the toughest working environments. Check it against the part you are replacing before ordering, or ask the PartsForMachines team. Covered by a 12-month warranty against breakage; wear is not covered.