16-foot each helix design copolymer nylon resin and synthetic trimmer/edger line Pliable and flexible allowing for the line to stretch and cushion on impact with hard surfaces Aerodynamic shape allows less drag for more efficient cuts 100-pound of tensil strength compared to old lines that only offer 68-pound of strength Spool fits cordless Worx series grass trimmers/edgers: WG118E, WG119E Interchangeable with part number 50022833
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