Manufactured with International Standards ISO-9002 (1997), Quality Standards QS-9000 (2002), and Technical Specifications TS-16949 (2007) which ensures products are safe, reliable, and quality

DNJ Piston Rings consist of 3 Types of Materials:

• Cast Iron: Resistant to destruction and weakening by oxidation for longer lasting rings.
• Steel: Controls qualities such as hardness ductility and tensile strength.
• Ductile: Ability to change form without breaking for a more precise cylinder seal.