JT Sprockets Aluminium Rear Sprocket Honda CR 125 1983 - 2007 CR 250 1984 - 07 CR 500 84 - 2001 CRF 250 R 2004 - 2023 CRF 450 R 2002 - 23 Beta RR Enduro 2013 - 2021, 49T

JT Sprockets is the world's leading manufacturer of aftermarket sprockets, constantly raising the industry's standards for quality and service. Precision CNC machined to JT's uncompromising standards from certified 7075-T6 Ergal aviation grade aluminium alloy, the JT RaceLite sprocket range is designed and engineered to withstand extreme pro-race conditions, providing maximum strength and durability at minimum weight.

http://www.jtsprockets.com/catalogue/part/JTA210BLK/