[Spool Specifications]: Replacement spool for WA0010 trimmer with a 9m long and 1.65mm diameter trimmer line, compatible with original WA0010 spool models and covering models WA6531 GT / 50006531. [Compatible Models]: WA0010 Replacement Spool is compatible with WORX: WG150, WG151, WG151.5, WG152, WG153, WG154, WG155, WG155.5, WG156, WG157, WG160, WG160.1, WG160.2, WG165, WG175, WG180. [Professional Design]: WG180 WG163 replacement spool features CNC machining, ensuring the Worx trimmer spool is cut and wound automatically, preventing tangles during cutting. [High Efficiency]: Premium 3m/1.65mm line trimmer line and spool housing easily cut grass and weeds. It offers higher tensile strength compared to older lines that only provide 68 kg of resistance. It's flexible, allowing the line to stretch and absorb impacts on hard surfaces. The aerodynamic shape reduces drag for more efficient cutting.