Echo Black Diamond Trimmer Line - 3 Lb Spool - .105 in. 330105073

What It Is

The Echo Black Diamond Trimmer Line is a heavy-duty, .105-inch diameter line designed for commercial-grade trimming on gas-powered string trimmers. It’s formulated with a proprietary polymer blend for increased durability and cutting performance in thick weeds and light brush.

Fitment & Compatibility

Before buying, confirm your trimmer accepts .105-inch (2.7mm) line—this is a medium-to-heavy gauge, common on Echo, Stihl, Husqvarna, and Ryobi straight-shaft trimmers. Check your trimmer’s manual for minimum/maximum line diameter; older or smaller curved-shaft trimmers often cap at .080 or .095 inch. The 3-lb spool fits most standard trimmer heads (bump-feed or reloadable), but verify your head’s line capacity—some low-profile heads may not hold the full spool. This is genuine Echo OEM line, so it’s guaranteed to match Echo’s own trimmer heads (e.g., Speed-Feed 400, 450) without modification.

Key Things to Know

• Durability: The “Black Diamond” coating reduces fraying and snapping, lasting 2–3x longer than standard round line in abrasive or rocky conditions.
• Installation: No special tools needed—wind line onto your spool in the direction indicated on the head. Over-tightening can cause jamming; leave slight slack.
• Common gotcha: .105-inch line is too thick for most electric or battery trimmers (e.g., DeWalt, EGO) unless specifically rated—check your manual to avoid motor strain.
• Weight: The 3-lb spool is a bulk buy; it’s heavy for casual homeowners but ideal for landscapers or large properties.

Should You Buy It

Buy this if you run a gas trimmer and need a durable, fray-resistant line for heavy-duty clearing or commercial use. It’s overkill for light grass trimming on a small electric mower, but for Echo, Stihl, or Husqvarna users tackling thick weeds and brush, the Black Diamond line delivers reliable, long-lasting performance that justifies the premium price.