NJS (Nihon Jitensha Shinkōkai) certified for Professional Keirin races in Japan - these chains are made to very high standards. 1/2" x 1/8" size, 106 links.
Made by D.I.D, makers of the world's No.1 Motorcycle Chains. Motorcycle drive chains are always subjected to be used under the most rigorous conditions, D.I.D derives the ultimate technologies in order to provide resistance to wear, durability against fatigue, and quiet operation. D.I.D motorcycle chains are trusted and highly rated. That is why D.I.D chains are used in major motorcycle races, such as Moto GP and the Paris-Dakar Rally.
Another feature of the D.I.D Racing Pro is the superior DHA pin treatment that not only hardens the chain pins for extra durability, it also adds an extra layer of a protective pin coating that prevents oxidation - rendering the chain rust-proof. The process of oxidation can then be minimized, even without much care and maintenance.