Overview Reviews Product Description Sprocket,3/8" Bore , 21 ToothType: 21-ToothOEM Numbers are used for reference only. California Residents only WARNING: Cancer and/or Reproductive Harm - www.p65warnings.ca.gov Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Commercial Parts Duke 175517 - Sprocket,3/8" Bore , 21 Tooth Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Review Subject *Comments