Martin 11LP-40B18 Sprocket FNIP

40BS18H X 1" Type B Heat Treated Sprocket for #40 Roller Chain 18 Tooth 1" Bore

Martin 40B18 Sprocket FNIP

Katayama Chain FBN60B15D35 Sprocket FNIP

40B18H X 1" Sprocket Type B | #40 Roller Chain | 18 Tooth | 1" Finished Bore

40B18H Type B Heat Treated Sprocket for #40 Roller Chain - 18 Tooth - 3/4" Bore*

40B18H Type B Heat Treated Sprocket for #40 Roller Chain - 18 Tooth - 5/8" Bore

40B18H Type B Heat Treated Sprocket for #40 Roller Chain - 18 Tooth - 7/8" Bore