Genuine Stihl part suitable for some of the following models; FS40-4144, FS50-4144, FS50C, FS56R, FS56C, FS56-4144, FS70R, FS70C, KM56R Part is "used" but was ordered in error and fitted for a very short time before realising that the machine was beyond economical repair. Any questions feel free to ask. Free postage.