Oregon 20-117 Replacement 0.080 Platinum Gatorline, 207-Feet Durable, armored exterior for resistance to abrasion, breakage and welding Flexible core is resistant to cracking and breaking Low drag Supertwist design for longer run time Lower vibration and noise compared with traditional nylon lines High resistance to abrasion and breakage. Flexible core provides outstanding durability. Less engine drag, vibration, and noise. Engineered to resist welding up to 498 F. Outer layer prevents welding. User friendly donut  fewer tangles. High strength inner core resists breaking. Long-life, excellent strength. Fits all standard trimmer heads. User-friendly donut, limits tangles. Fits all standard trimmer heads. Effective in all cutting conditions.