BLACK+DECKER AF-100 30ft 0.065" Autofeed Replacement Spools Fits most BLACK+DECKER AFS string trimmer models including: GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7700, CST1000, CST1200, CST2000, MTC220, MTE912, NST2018, NST1118, NST2118, LST220, LST300, LST400, LST420, LST136 Auto Feed System replacement spool eliminates time spent hand-winding string trimmers 30-foot replacement line is factory wound for a superior feed Utilizes centrifugal force for maximum performance Includes a 0.065-inch diameter line Compatible with most BLACK+DECKER string trimmers