For competition and OEM replacement Super/ultra strong; 520 series has tensile strength of 9,400 lbs. (EU: 4263,77 kg) , 530 series tensile strength of 11,100 lbs. (EU: 5034,88 kg) Minimize clearance between plates Improved stiffness and weight Includes rivet-style master link. CHAIN 520ZVX3 X 120 LINK
