DID 520ERV7 Gold Chain 124 Link

DID 520ERV7 Gold Chain 124 Link

The 520ERV7 is an upgrade that will replace the 520ERV3. The 520ERV7 is an upgrade that will replace the 520ERV3. Quite a bit of a jump from 3-7
It has been over a decade since the 520ERV3 was introduced, so the 520ERV7 will see significant upgrades, including stronger inner plates, resulting in a 3% higher tensile strength, and a greater chain life, which is increased by 13% due to material upgrades with our patented X-Ring seal. The ERV7 will be slightly heavier than the ERV3 at 3.41 lbs per 100 links.