Marketing Color: Natural Material: Steel Sprocket Position: Rear Sprocket Size: 420 Sprocket Teeth: 37 JT Sprockets are made from the latest generation of computer design and control metal cutting equipment for maximum durability. JT rear sprockets are made from the finest C45 high carbon steel. All sprockets are heat-treated and hand-finished to meet or exceed the highest possible quality standards. Induction hardened with black zinc finish available on certain sprockets. This item fits H-D the following vehicle applications: fits HON CRF50F 2011-2020 fits HON CRF50F 2004-2009 fits HON XR50R 2000-2003