Grass Gator 20155A Pre-Cut Red Trimmer Line, 0.155-Inch x 21-Inch (10-Count) | Heavy Duty Commercial Grade Replacement for Walk Behind String Mowers & Gas Trimmers

What It Is

The Grass Gator 20155A is a pre-cut, heavy-duty commercial grade trimmer line designed for walk-behind string mowers and gas trimmers. It’s intended for high-volume trimming on larger properties, where you need consistent, ready-to-load pieces that resist fraying and breaking.

Fitment & Compatibility

Before buying, measure your trimmer’s spool diameter and line entry slots—this 0.155-inch line is too thick for many home-use trimmers. It fits most commercial walk-behind mowers (e.g., Grasshopper, Gravely, Toro) and heavy-duty gas trimmers with spools rated for 0.155-inch line. Check your manual or existing line diameter; if your machine uses 0.130-inch or 0.095-inch line, this won’t feed properly. The 21-inch length is pre-cut—verify your spool accepts that length (common for larger spools). Aftermarket part, not OEM-specific, but widely compatible with standard bump-feed and fixed-line heads that accommodate .155 line.

Key Things to Buy

• Quality & Durability: Pre-cut line reduces waste and loading time. Red color indicates commercial-grade nylon, which lasts longer than standard line in heavy brush or along fences.
• Installation Difficulty: Very easy—just snap or feed each 21-inch piece into your spool. No winding or measuring needed. However, ensure your spool’s line slots are wide enough for .155-inch line (tight fit on some models).
• Common Gotchas: This line is thicker than most homeowner trimmer line—will not work with standard electric or small gas trimmers. If your machine uses a fixed-line head, make sure the head can accept pre-cut lengths (most can). For bump-feed heads, you may need to manually feed the line through the eyelet first.
• Cost vs. Value: At $12.99 for 10 pieces, it’s pricier per piece than bulk spools, but saves time if you’re loading multiple machines or doing commercial work.

Should You Buy It

Buy this if you run a commercial walk-behind mower or a heavy-duty gas trimmer that accepts .155-inch line and you want a ready-to-load, tough line that lasts through thick grass and weeds. Skip it if you have a standard homeowner trimmer (line too thick) or prefer bulk spools for lower cost per foot.