... 1023 2. OEM 3. Heat treatment 4. Surface: zinc, nickel, chromium Blast sanding, electrophoresis 45#, Heat Treatment Motorcycle Roller Chain Sprocket ... Kit1 SPROCKET MARKMaterial: 1045 1023Heat treatmentSurface: zinc, nickel, chromium, Blast sanding, electrophoresisPackaging: polybag and carton or your own packagingSprocket ...