Ideal O.E.M. replacement offering 1.5 to 2x longer wear resistance than regular O-ring chains.Each refined component, designed with computer analysis, provides higher tensile strength. Speciallycontrolled heat treatment means tougher material and more durability. Q4 seal ring and reinforced pin androller provide superior wear resistance, higher impact resistance and fatigue strength. Q4 seal ringoffers less friction, which minimizes power loss, almost half that of standard O-ring chain.