https://www.lowes.com/pd/WORX-Spool-Cap-Cover-for-WG168-and-WG191-13in-Electric-String-Trimmers/5000206523
WORX Plastic String Trimmer Spool Cap Cover WA0037 at Lowes.com
Shop WORX Plastic String Trimmer Spool Cap Cover WA0037 in the String Trimmer Parts department at Lowes.com
plastic stringspool capworxtrimmer
https://www.canadiantire.ca/en/pdp/worx-wa0207-spool-and-cap-for-cordless-trimmers-10-ft-3-pk-0601380p.html
WORX WA0207 Spool and Cap for Cordless Trimmers, 10-ft, 3-pk | Canadian Tire
Each spool in the Worx WA0207 3-piece Replacement Trimmer Line and Spool Cap kit comes pre-wound, so you can just pop them into your trimmer and get to work....