✅Size :Roller Chain Sprocket 6.35mm (1/4") Pitch,15Teeth,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.