Usage Tips:This Replacement Grass Trimmer Line Spool Set Is Designed For Weed Eater. With The Auto Feed System, The Replacement Spool Eases The Tedious Work Of Hand-Winding Spools. The Spool Compatible With for Utilizes Centrifugal Force To Feed The Trimmer Line As It Is Needed. High-Quality 10FT/ 3.1M Weed Eater Edger Line String Easily Cuts Through Grass And Weeds. Strong Toughness, Not Easy To Break, Necessary For Garden Mowing. Use Tips: Always Wear Eye Protection. Unplug Tool Before Changing, Installing, Or Removing Accessories. Only Suitable For Tender Weed Grass. Tough And Strong Weeds Please Use Blades To Trim. Type:Trimmer Spool For Model:Wa0010 Spool Line Size:4x1.8cm/1.57x0.71inch Spool Length:3.1m x 1.65mm Applicable for System:Wg150, Wg151, Wg151.5, Wg152, Wg153, Wg154, Wg155, Wg155.5, Wg156, Wg157, Wg160, Wg160.1, Wg160.2, Wg163, Wg165, Wg175, Wg180 Colour:As Shown Material:Plastic+Metal Package Contents: 20 x Spool Line 2 x Cap Cover 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.