Specification: Name: Grass Trimmer Reel for Worx Material: ABS nylon wire + polyamide Size: 3.05m/ 1.65mm Compatible with Spool Model: WG150, WG151, WG151.5, WG152, WG153, WG154, WG155, WG155.5, WG156, WG157, WG150E, WG154E, WG155E, WG157E, WG160E, WG163E, WG166E, WG167E, WG169E, WG157E, WG15 7E.9,WG163E,WG163E.1,WG163E.2,WG163E.3,WG163E.6,WG163E.9,WG184E Precautions Instructions: Wear safety glasses and long pants when using this product to avoid injury from spilled lines. Unplug the tool from the power source before changing, installing or removing accessories. This cordless weed eater refill is reserved for young grass. Tough weeds require other tools such as blades to trim. Package includes: < br/>4 x Replacement Spools< br/> 1 x Replacement Trimmer Spool Cap Cover