NOVWANG 40 Pack Universal Walk Behind String Trimmer, String Trimmer Line 21.25 Inches x 0.155 Inches Heavy Duty Trimmer Line Compatible with Mowers, Orange Nylon Trimmer Line

What It Is

This is a pack of 40 pre-cut universal trimmer line pieces designed for walk-behind string trimmers (not handheld string trimmers or brush cutters). Each piece measures 21.25 inches long by 0.155 inches thick, made from heavy-duty orange nylon.

Fitment & Compatibility

• Check your deck size: These 21.25-inch lines work best on mowers with a cutting deck of roughly 30 to 42 inches. Smaller decks may require shorter lines to avoid excessive vibration.
• Check your trimmer head: This line is for universal walk-behind trimmers with fixed-line heads, not for bump-feed or auto-feed heads. Ensure your mower uses pre-cut line segments (not continuous spool).
• Line thickness: 0.155 inches is a common medium-heavy gauge. Confirm your trimmer head accepts this diameter (check owner’s manual for line diameter range). Too thick may not fit the exit slots; too thin may snap.
• Brand compatibility: No OEM-specific design—works with most brands (Troy-Bilt, Cub Cadet, Husqvarna, etc.) that use standard 0.155-inch line in walk-behind trimmers.

Key Things to Know

• Quality concerns: With a 3.2 rating and only 13 reviews, some users report the line is brittle and snaps more quickly than premium brands like Oregon or Arnold.
• Installation is simple: No tools needed—just slide each piece through the trimmer head slots and line up the ends. Takes about 2 minutes per head.
• Length variation: The 21.25-inch length is longer than many stock lines (often 18–20 inches). On smaller decks, this can cause the line to slap the deck or reduce cutting efficiency.
• Not for heavy-duty use: This is fine for light residential trimming (grass, light weeds) but may not hold up against thick brush or rocky terrain.

Should You Buy It

This is a budget-friendly option if you need a large quantity of line for a walk-behind mower with a medium-to-large deck and you’re doing light trimming. Skip it if you need durability for tough weeds, if your mower uses a bump-feed spool, or if you want a line that lasts more than a few passes. For the price, it’s a decent backup pack but not your primary line.