Worx WA0014 Spool & Line for WG168, WG190 & WG191 Cordless String Trimmers 20-foot x 0.08 helix design copolymer nylon resin and synthetic trimmer and 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 Spool fits WORX series trimmers/edger's: WG168, WG190 and WG191