• 1.Trimmer head thread size: M10 x 1.0mm left hand
• 2. Fitment:for STIHL FS44 FS55 FS56 FS70 FS80 FS83 FS85 FS90 100RX FS110 FS120 FS130 FS200 FS250 KM55 KM56 KM 85 KM90 KM110 KM130 + FS-KM
• 3. Takes all trimmer line shapes from 2.0mm to 3.2mm diameter
• 4.Replacement Part Number:4002 710 2189
• 5. Replaces Stihl Trimmer ( POLYCUT 20-3 ) Head