The Stihl OEM Trimmer AutoCut C 6-2 Spool Insert 4006-820-1500 is a high-quality replacement part designed specifically for Stihl trimmers. This spool insert is compatible with models such as FS 38, 40, 45, 46, 50, FSA 60, 86, FSE 60, 71, 81, and KM. With a pack containing one spool insert, this product ensures that your Stihl trimmer continues to perform at its best, providing precision and efficiency in maintaining your yard and garden.