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 1 in Number of Teeth 23 Outside Diameter 1.969 in Pitch Diameter 1.836 in Bore Type Plain Chain Number 25 Finish Plain Hub Diameter 1 1/2 in Hub Projection 0.625 in Standards REACH Certification RoHS Compliant