Product Description Since the end of 2002, the chain tensioner has been equipped with a modified torsion spring. With the conversion kit, older chain tensioners can be converted to the new spring. You can find instructions on how to do this from Rohloff. Of course, the kit can also be used to supply spare parts for the chain tensioner. Manufacturer Number:8248 Contents:1 x Rohloff chain tensioner spring1 x snap ring1 x bevel washer1 x countersunk-head bolt1 x nuts Manufacturer: Rohloff AG Mönchswiese 11 34233 Fuldatal Germany service@rohloff.de