Coil diameter: 67*31mm Grass rope: 5.9M*2.0mm High quality ABS spool and durable, flexible nylon polyamide line. Use centrifugal force and aerodynamics to reduce drag and achieve a fast cut. Features: For use with Black Decker mower models GH3000 GH3000R LST540 LST540B Mowing rope model: SF-080/ SF-080BKP High quality ABS spool and durable polyamide nylon yarn, flexible and long life. Uses centrifugal force and aerodynamics to reduce drag and achieve a fast cut. The package includes: 4 x String Trimmer Spool Specifiction: Color: black coil with green line Material: ABS spool, nylon thread Advice: 1) Wear safety glasses and long pants when using this product to avoid injury from line spillage. 2) Unplug the tool before changing, installing or removing any accessories. 3) This cordless weedkiller parts refill is only suitable for young grass, strong weeds use other tools such as blades to cut.