Usage Tips:Suitable For Models - Fits Several Worx Trimmer Models: Wg150, Wg151, Wg151.5, Wg152, Wg153, Wg154, Wg155, Wg155.5, Wg156, Wg157, Wg150E, Wg154E, Wg155E, Wg157E, Wg160E, Wg163E,Wg166E,Wg167E,Wg169E,Wg157E,Wg157E.9,Wg163E,Wg163E.1,Wg163E.2,Wg163E.3,Wg163E.6,Wg163E.9,Wg184E Coil Specification - Worx Spool 1.65Mm / 3.05M. Premium 3.05M Auto-Feed Trimmer Line Provides A Wider Range Of Cutting Space That Can Easily Cut Through Grass And Weeds. The Coil Diameter Is 40Mm And The Center Coil Hole Is 15Mm. Please Check This For A Perfect Fit Before Purchasing. High Efficiency- Premium Nylon And Abs Webbing. The Replacement Trimmer Spool Is Made Of High Quality Abs And Nylon Resin Fabric With An Oval, Streamline Shape That Gives The Line-To-Line Trimmer Better Flexibility And Durability, Increasing The Life Of The Edges Up To 25 percent Lower Than Normal Use. Easy To Use- No Complicated Processes. The Auto-Feed System Spare Spool Frees You From Tedious Manual Winding Work. Package Included- 4 X Spare Trimmer Line Spool 1X Spare Cap Good Value For Money, Easy Replacement. You Are Backed By An Unconditional 30-Day Money Back Guarantee And Friendly Customer Service