Premium Material. The for grass trimmer line is made of materials with an oval, aerodynamic shape that gives the for spool better flexibility and durability which has a tensile strength of over 45kg and is 30% more than other for longer life. fits multiple for Strimmer Models: WG150, WG151, WG151.5, WG152, WG153, WG154, WG155, WG155.5, WG156, WG157, WG160, WG160.1 WG16. 0.2, WG163, WG165, WG175, WG180 Trimmer line spool for Weeder adopts an elliptical aerodynamic shape, reducing air resistance, pliable and flexible, allowing to stretch and cushion on impact on hard surfaces, increasing cutting efficiency by 50%, allowing each spool to cut more weeds. For Weed Eater Coil automatically feeds the trimmer by centrifugal force, reducing the hassle of manual sorting of the replacement trimmer line coil while working. Color: Orange Material: plastic Package Contents: 12 x spools 3 x caps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.