This is Stihl's autocut 6-2 fs38 trimmer head that fits Stihl FSE60/ Stihl FSE71/ Stihl FSE81 /Stihl FS38 /Stihl FS40 (current model - 2007, not previous version - 2000 years ago) /Stihl FS46 /Stihl FS50. Dimension: diameter 120 mm/4.72". Material:...