Replacing OEM numbers: 4140 711 3202,41377113202, 4137-711-3202, which is a direct replacement for the old or broken one. Compatibility: This flexible drive shaft is designed to be fully compatible with a variety of trimmer models, including compatible with STIHL FS70R, FS56RC, FS56R, FC56, FC70, FS55R, providing flexibility for your landscaping tasks. Performance Enhancement: This drive shaft optimizes your trimmer's efficiency, providing smoother operation and better cutting performance, helping you complete tasks more efficiently. Material: This specially designed metal material ensures a long lifespan and resists damage. Easy Installation: Direct replacement with no adjustments required, ensuring perfect compatibility and high reliability., Manufacturer: AS Axis Spindleon