Suitable for Black Decker: Fits most trimmer models: GL280, GL301, GL425, GL430, GL545, GL555, GLC13, GLC2500, GLC2500L, GLC3000, GL4525, GL.4525S.B, GL5028, GL5028SB, GLC1423L, GLC1825L, GLC3625L, STC1820, STC1815, ST4525, ST5530, STC1820PC, EPC, STC1840, EPC, ST1823 etc. Quality Trimmer Line: 9.15m trimmer thread can allow a larger mowing range with a diameter of 1.65mm, the polyamide nylon line is durable and flexible. It is not easy to break, which ensures continuous work.Fast and Clean Cutting: The replacement spool of the automatic feed system makes the tedious work of manually winding spools easier. It uses centrifugal force and aerodynamics to reduce drag and achieve fast and clean cuts.Perfect Replacement Spool: They perfectly replace most original Black Decker spool models such as A6481, A6485, AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2. The spool can be inserted and removed without tools, and the operation is simple. At the same time, damage to the device is avoided and the thread is optimally used.Great Value Set: The package includes 6 replacement grass trimmer spools, 1 replacement cap and 1 replacement spring. The spool cap replaces the RC-100-P cap, the spring replaces the RC-100-P spring. Excellent value for money.Specification:Material: NylonThread Length: 9.14mThread Diameter: 1.65mmSpool Dimension: ?6.3cmx2.7cmPackage Includes:6 x Trimmer Spool1 x Cap1 x SpringPrecautions1, This product is only suitable for young grass. For strong weeds, use other tools, such as shears.2, Always wear goggles. Before replacing, installing or removing accessories, please unplug the tool to prevent the splashed wire from hurting people.3, Not suitable for other brands of trimmers.