12B 3/4" Taper Bore Simplex Sprocket 21 Teeth, Taper Bush, 61-21. 12B 3/4" Taper Bore Simplex Sprocket 38 Teeth, Taper Bush, 61-38. 3SR 06B 3/8" 24 Teeth Chain Sprocket 06B-1, Pilot Bore, 3SR24, 24T PB.
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