Set of 3 replacement spools for Stihl Autocut C3-2 cutting head, compatible with FSA 57

Description Note: This replacement spool is only compatible with the FSA 57 cordless grass trimmer with the AutoCut C3-2 cutting head! Please check your machine's serial number: all FSA 57 models with a serial number starting with "5" are compatible with the AutoCut C3-2 cutting heads. All FSA 57 models with a serial number starting with "9" are not compatible with this spool. FSA 57 replacement spool, with 2 mm diameter nylon line, replaces part numbers 4009 710 4305 and 4009 710 4306. Contents: Pack of 3 replacement spools. Inserting the spool into the cutting head automatically advances the nylon line to the ground. The nylon line is easily reloaded.