Martin Roller Chain Sprocket, Bored-to-Size, Type B Hub, Single Strand, 40 Chain Size, 0.5" Pitch, 30 Teeth, 1" Bore Dia., 5.057" OD, 3.25" Hub Dia., 0.284" Width


Martin Roller Chain Sprocket, Bored-to-Size, Type B Hub, Single Strand, 40 Chain Size, 0.5" Pitch, 30 Teeth, 1" Bore Dia., 5.057" OD, 3.25" Hub Dia., 0.284" Width