Overview Product Description 207389 New-No Box; Martin 40B25-5/8 Sprocket # 40; 25T; 5/8"ID; . Item is New; unused; no factory packaging. Austin Surplus SKU: 207389 Location: 174098-GRG-R13-P15-S05-A-0000560 Product Videos Custom Field MPN 40B25-5/8 Product Reviews