Info:Martin 12A42 Type A Single Strand Solid Stock Bore Roller Chain Sprocket, 24 mm Dia Bore, 266.665 mm OD, #12B-1 Chain, 42 Teeth, 19.05 mm Pitch, Steel
Info:TRITAN® 12A42 X 24MM Metric Series Plate Type A Plain Bore Single Strand Precision Roller Chain Sprocket, 24 mm Dia Bore, #12 Chain, 42 Teeth, 3/4 in Pitch, Forged Steel
Info:TRITAN® 12A45 X 25MM Metric Series Plate Type A Plain Bore Single Strand Precision Roller Chain Sprocket, 25 mm Dia Bore, #12 Chain, 45 Teeth, 3/4 in Pitch, Forged Steel
Info:TRITAN® 12A57 X 32MM Metric Series Plate Type A Plain Bore Single Strand Precision Roller Chain Sprocket, 32 mm Dia Bore, #12 Chain, 57 Teeth, 3/4 in Pitch, Forged Steel