K. K. Industrial Products offers Cast Iron Piston Ring. K. K. Industrial Products offers a wide range of Compressor Spare Parts and industrial components used in the Air Conditioning and Refrigeration systems. The Cast Iron Piston Ring comes in Pressure die casted, gravity die casted or shell moulded for and is made out of aluminium alloys, graded closed grained cast iron. The Cast Iron Piston Ring individually centrifugally casted to provide smooth operation in all types of Compressors.