ECHO SRM-2620T Trimmer The SRM-2620T straight-shaft string trimmer has a 2:1 gear ratio, which provides 21% more torque than the competition. Features Its 25.4 cc professional-grade 2-stroke engine provides excellent performance and durability Its 2:1 high torque gear ratio delivers fast and efficient cutting Its rubber front and rear hand grips provide superior user comfort Its Speed-Feed® 400 head reloads in seconds without disassembly Has a tool-free access air filtration system that allows for easy and convenient field servicing The two-stage air filtration system enhances cleaning efficiency and allows for longer maintenance intervals Its 17-inch cutting swath trims quickly and efficiently The large 20.6 fl. oz. fuel tank extends run time between fill-ups Its Bellows-style fuel transfer system allows for easy starting, especially for re-starts in hot, dusty environments Uses a .095" Black Diamond® Nylon Line Includes a Std. SRM Shield Has a 59" shaft length Features a 4-Layer Cable Drive Shaft