Sprocket for Detachable Chain, 7 Teeth w/ 4.50″ OD & 1/2″ Bore Fits 45 or 55 Chain Our eBay Store About Us Contact Us Add to Favorite Sellers Sprocket for Detachable Chain 45 & 55 – 7 Teeth w/ 4.50″ OD & 1/2″ Bore 32.95