Overview Product Description 201347 New-No Box; Martin 60B13-3/4 Sprocket # 60; 13T; 3/4"ID; . Item is New; unused; no factory packaging. Austin Surplus SKU: 201347 Location: 157783-GRG-R01-P09-S04-F-0000435 Product Videos Custom Field MPN 60B13-3/4 Product Reviews