Overview Product Description 189679 New-No Box; Martin 40B25-5/8 Sprocket; # 40; 5/8" ID; 25Teeth; . Item is New; unused; no factory packaging. Austin Surplus SKU: 189679 Location: GRG-R13-P08-S04-C-0001903 Product Videos Custom Field MPN 40B25-5/8 Product Reviews