✅Size :Roller Chain Sprocket 15.88mm(0.625") Pitch,12Teeth,5/8"Bore Diameter, 0.187" Keyway with 2 Setscrews at 90 degrees,B Type.
✅Material:Sprocket is made of AISI 1045 Medium Carbon Steel, gear part of high temperature quenching heat treatment, high hardness, Harden Teeth at HRC38-42,wear resistance.