Overview Product Description 245105 New-No Box; Martin 50BS12-3/4 Sprocket #50; 12 Teeth; 3/4"ID; . Item is New; unused; no factory packaging. Austin Surplus SKU: 245105 Location: GRG-R01-P01-S04-B-0001418 Product Videos Custom Field MPN 50BS12-3/4 Product Reviews