| Manufacturer | Greenworks |
| Model | 21142 |
For replacing string:
https://www.youtube.com/watch?v=uAgKchFx-_Q
Uses .065-Inch String
(note to repairers: we were able to fix by buying the generic head replacement outright)
Station North Tool Library
http://toollibrary.org
417 E Oliver St.http://toollibrary.org
Baltimore, MD, 21202
USA
410-347-0850