Comparison : Item # D100B9, No. 100 - 1 1/4" Pitch - Multiple Strand Sprockets
Item # D100B10, No. 100 - 1 1/4" Pitch - Multiple Strand Sprockets
Item # D100B11, No. 100 - 1 1/4" Pitch - Multiple Strand Sprockets
Item # D100B12, No. 100 - 1 1/4" Pitch - Multiple Strand Sprockets
Item # D100B13, No. 100 - 1 1/4" Pitch - Multiple Strand Sprockets