The ring is piston compression top, 740.1004030

It is made of high-strength cast iron, thermoimproved that guarantees the set elastic properties throughout all term of operation. Cross section in the form of a unilateral trapeze. Solid chrome is applied on a working surface, special grinding in provides it a barrel-shaped form that improves to extra earnings and raises a work resource. Processing on the high-precision equipment of firm Germany and Japan guarantees to 100% a prileganiye to a sleeve of cylinders.