Worx, replacement helix line trimmer spool, fits model #wg150, .065" diameter line, 16' length, grass trimmer line 2 pack for cordless series: wg150s,151s,152, 155s, 165,166 gt cut case, worx 2 pack trimmer/edger line is made from a patented copolymer nylon resin & synthetic material designed with an oval aerodynamic shape known as doublehelix dnaline2, this patented design increases edging life up to 25% compared to normal use conditions, this patented resin line is softer allowing for the line to stretch & cushion on impact with hard surfaces, it has over 100 lbs of tensile strength compared to old lines that only offer 68 lbs of strength, dna2 trimmer line is durable & flexible for longer life.

• 2 Pack of 10ft each helix design co polymer nylon resin
• Pliable and Flexible Allowing for the line to stretch and cushion on impact
• Aerodynamic shape allows less drag for more efficient cuts
• 100 lbs of tensil strength compared to old lines that only offer 68lbs of strength