YWTESCH 8 Pack Weed Wacker String Fit for Greenworks String Trimmer, 0.065"-18Ft Dual String Trimmer Line Auto-Feed Weed Eater String Replacement Parts Spool(6-Pack) Cap Cover(2-Pack)

What It Is

This is an 8-pack replacement set for Greenworks string trimmers, including six pre-wound spools (0.065″ diameter, 18 ft total line per spool) and two cap covers. It’s designed for auto-feed trimmer heads and is intended for light to medium residential trimming tasks.

Fitment & Compatibility

Before buying, verify your trimmer uses a 0.065″ line diameter—this is the thinnest common size, suitable for light weeds and grass, not thick brush. Check that your Greenworks model has an auto-feed bump head; these spools won’t work with manual-feed or fixed-line heads. Measure your existing spool’s outer diameter and cap design—this set fits most Greenworks 40V and 80V trimmers, but not all 20V or older models. Look up your specific model number (e.g., ST40B00, ST80L00) in the product description’s compatibility list. These are aftermarket parts, not OEM Greenworks, so fit may vary slightly on newer or less common models.

Key Things to Know

• Line quality: The 0.065″ line is thin and breaks easily on thick weeds or against fences; expect more frequent replacement than thicker 0.080″ or 0.095″ lines.
• Installation: Spools come pre-wound and ready to drop in—no winding needed. Remove the old spool, align the line through the eyelets, and snap the cap on. Takes about 2 minutes per spool.
• Auto-feed reliability: The auto-feed mechanism may occasionally jam or fail to advance line if the spool is slightly misaligned or if debris gets into the head. Test feed before full use.
• Cap cover fit: The included cap covers are plastic and may crack if overtightened; hand-tighten only.

Should You Buy It

If you have a compatible Greenworks auto-feed trimmer and only need to trim grass and light weeds, this is a budget-friendly option for keeping extra spools on hand. But if you deal with thicker brush or want longer-lasting line, skip this and buy thicker 0.080″ or 0.095″ spools instead.