The REGZRA or 'BLACK DUAL' chain kits are made up of a naturally colored steel chain. They are made from elements of alloyed steel with a high carbon content, allowing for high resistance to fatigue.The plates are laser marked for quick identification. They are pre-stretched and, thanks to the Z-Ring technology, the ZRA 'BLACK DUAL' chain kits ensure high mileage while reducing elongation and the frequency of lubrication. They are delivered with 2 type 19 and 44 crimping attachments and 1 semi-pressed quick attach type 42. 1x Crown 50-32114-38 1x Pinion 50-32160-14.