Comparison : Item # B-1212RA8, Sprocket Number B-1212R
Item # B-1212RA9, Sprocket Number B-1212R
Item # B-1212RA10, Sprocket Number B-1212R
Item # B-1212RA11, Sprocket Number B-1212R
Item # B-1212RA12, Sprocket Number B-1212R