D.I.D is a Japanese manufacturer of high-performance transmission parts renowned worldwide for the quality of its chains and chain kits. This is a spare rivet link for 520 ERV7 chains. The product is a universal closure link with a rivet closure (ZJ) for the DID 520 ERV7 chain. It features an O-ring design and comes in a gold color. Please note that the sale concerns the joint link only and not the chain. The item is made in Japan.