Horstman sprockets are made at our factory in the USA from .160" aircraft aluminum alloy heat treated,grained,and anodized red for lasting protection and reduced friction. The center hole and bolt circle fits American and Euro sprocket hubs. #35 SPLIT STYLE UNIT PRICED BY TOOTH SIZE: SPROCKET SIZE 53-60 $19.06 61-76 $20.86 77-85 $23.52