Comparison : Item # D40B11, No. 40 - 1/2" Pitch - Multiple Strand Sprockets
Item # D40B12, No. 40 - 1/2" Pitch - Multiple Strand Sprockets
Item # D40B13, No. 40 - 1/2" Pitch - Multiple Strand Sprockets
Item # D40B14, No. 40 - 1/2" Pitch - Multiple Strand Sprockets
Item # D40B15, No. 40 - 1/2" Pitch - Multiple Strand Sprockets