[Fits multiple string trimmer models]: GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7700, CST1000, CST1200, CST2000, MTC220, MTE912, NST2018, NST1118, NST2118, LST220, LST300, LST400, LST420, LST136 af-100 replacement
[Excellent quality]: The 065 trimmer line of 30-feet/0.065-inch diameter weed wacker string which it is easy to cut grass and weeds.
[Note]: trimmer spools is only suitable for tender grass, the strong and tough weeds that need trim by blade.weed eater line.
[Accessories included]: 10 X replacement weed eater string trimmer, 2 X replacement cap and 2 X replacement spool spring.
[Auto Feed System Replacement]: Newjinda trimmer replacement spool is suitable for black decker string trimmer and utilizes centrifugal force to feed the trimmer line as it is needed. The auto feed system replacement spool eases the tedious work of hand-winding spools