Chain Sprocket Bore Diameter 1/4 in For Chain Pitch 1/4 in For Number of Strands Single Hub Type One Side Material Stainless Steel Maximum Bore Diameter 15/16 in Number of Teeth 22 Outside Diameter 1.889 in Pitch Diameter 1.757 in Bore Type Plain Chain Number 25 Finish Plain Hub Diameter 1 7/16 in Hub Projection 0.625 in Standards REACH Certification RoHS Compliant