THIS IS A 20 TOOTH GEARBOX SPROCKET TO FIT NORTON COMMANDO 750 OR 850. CHAIN SIZE IS 5/8" x 3/8" PART NUMBER 06-0931 QUALITY ITEM MADE IN THE UK. FOR REAR SPROCKETS SEE OUR OTHER LISTINGS IF YOU HAVE ANY QUESTIONS ABOUT THIS ITEM THEN YOU CAN CONTACT US ON 01371 876027
