BLACK+DECKER AF-100 String Trimmer Replacement Spool with 30 Feet of .065-Inch Line Replacement spool for LST136, LST220, NST2118, ST7700 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 .065-inch diameter line Replacement spool for LST136, LST220, NST2118, ST7700 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 .065-inch diameter line Compatible with most BLACK+DECKER string trimmers