Nanki International [India] manufactures Heat Treated Piston Ring. Nanki International [India] supplies precision engineered automobile components. Heat Treated Piston Ring is manufactured as per industry defined standards which and they enhance the efficiency of automobiles. Heat Treated Piston Ring is manufactured in cast iron, aluminum alloy, alum 13/16 and other suitable metals. These pistons are oval turned heat treated and given a diamond / tin finish. They are manufactured in individually casted cast. These are available in different sizes and models.