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 SPOOL- 1.65mm/3.05m Worx Spool. 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 at 25% over normal use. EASY TO USE - No complicated processes. 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.