General description The 8 Pack Trimmer Spools are designed for compatibility with Black and Decker trimmers and brushcutters. This kit includes 6 trimmer cords, 2 caps, and 2 springs, providing everything you need for efficient trimming. Technical specifications String Trimmer Line Length: 30ft Diameter: 0.65mm Material: Plastic spool with nylon line Compatibility and accessories Compatible with Black Decker AF-100-3ZP Compatible with brush cutter models: GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7200, ST7700, ST7701, ST8600, ST9000, CST100, CST11000, CST1000, CST1200, CST2000, MTC220, MTE912, NST1018, NST1810, NST2018, NST2118, LST120, LST136, LST140, LST201, LST220, LST300, LST400, LST522, LST1018, LSTE523, LSTE525, BESTA510, BESTA512, BESTE620 Usage Ensure the motor rotation speed is high for optimal performance. Be aware of strong centrifugal force and high cutting speed during operation. Wear protective glasses and long pants to avoid work accidents.