Patented copolymer nylon resin and synthetic line Oval shape versus square reduces drag Suitable for series: WG150,WG151, WG152, WG155, WG160, WG165,WG166, WG167 Type: Spooled Length (Feet): 10 Line Diameter Measurement: 0.065-in Package Contents: 2 pre-wound spools of double helix trimmer line Package Quantity: 2 Warranty: None CA Residents: Prop 65 Warning(s): No UNSPSC: 27112700