Nylon trimmer Line Diameter: 1.3-5.0mm. Shape: Round, Square, Star, Heptagon, Square twist, Ellipse twist, Beads, ... Dual power. Nylon trimmer LineDiameter: 1.3-5.0mm.Shape: Round, Square, Star, Heptagon, Square twist, Ellipse twist, Beads, ... Mow GrassType: Slub YarnMaterial: 100% NylonFeature: Abrasion ResistantShape: Round/Square/Star/Heptagon/Beads/Ellipse Twist/Export Markets: North America ...