Oregon 19-003 Gatorline Square Trimmer Line .155-Inch Precut

What It Is

The Oregon 19-003 Gatorline Square Trimmer Line is a .155-inch (4mm) precut square trimmer line designed for heavy-duty trimming in EGO battery-powered string trimmers. It’s ideal for clearing thick grass, weeds, and light brush without frequent line breakage.

Fitment & Compatibility

• Line diameter: .155-inch (4mm) – verify your EGO trimmer’s maximum line size. Most EGO models (e.g., ST1510T, ST1520S, ST1620T) accept up to .155-inch, but some older or smaller models may be limited to .095-inch or .105-inch.
• Line type: Square profile feeds through standard bump-feed or auto-feed heads, but check if your trimmer head is compatible with square line (some heads are designed for round or twisted line only).
• Precut length: The line comes in 96 precut pieces (16.1 feet total) – no spool winding required. Works with EGO’s SpeedFeed or Pro-Feed heads.
• OEM vs aftermarket: This is an Oregon aftermarket line, not EGO OEM. It fits most EGO trimmers with a .155-inch capacity, but check your owner’s manual for recommended line diameter and shape.

Key Things to Know

• Durability: The square edges provide aggressive cutting on thick vegetation, but may wear faster on concrete or asphalt. Expect longer life than round line in grass/weeds.
• Installation: Precut pieces simplify reloading—no measuring or cutting. Just snap into the trimmer head slots. Some users report the square shape can be slightly harder to feed than round line.
• Compatibility gotcha: Double-check your trimmer’s line capacity. Using .155-inch in a head rated for .105-inch or smaller can cause jamming or motor strain.
• Noise/vibration: The square profile can produce more vibration than round line; not ideal for light-duty trimming near fences or fragile plants.

Should You Buy It

Buy this if you have a compatible EGO trimmer (rated for .155-inch line) and regularly tackle heavy weeds or thick grass. It’s a solid value for durability and convenience, but skip it if your trimmer has a smaller line capacity or you mostly edge along hard surfaces—round line will last longer on pavement.