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.9, WG163E.1, WG163E.2, WG163E.3, WG163E.6, WG163E.9. Coil Specification - WORX spool 1.65mm / 3.05m. Premium 3.05m auto-feed trimmer line provides a wider cutting range for efficient grass and weed trimming. Coil diameter is 40mm; center hole is 15mm. Please verify dimensions for compatibility before purchase. High Efficiency - Made of premium nylon and ABS material. The replacement trimmer spool features high-quality ABS and nylon resin construction with an oval, streamlined design that enhances flexibility and durability, extending edge life by up to 25% compared to standard use. Easy to Use - Designed for quick installation with no manual winding required. The auto-feed system allows for hassle-free line replacement. Package Included - 4 x spare trimmer line spools; 1 x spare cap. Durable, cost-effective replacement solution with straightforward setup. Backed by a 30-day money-back guarantee and responsive customer support.