FITS MODELS - Compatible with multiple Black and Decker string trimmer models: GH400, GH500, GH600, GH610, GH900, LSTE525, LST300, BESTA510, LCC340C, LST522, ST8600, ST7700, ST7000, ST6600, NST2118, NST2018, NST1118, NST1018, MTE912, MTC220, LSTE525BT, LSTE523, LST420, LST400, LST220, LST201, LST140C, LST136W, LST136B, LST136, LCC222, LCC221, LCC140, GH912, CST2000, CST1200, CST1000, BESTE620, BESTA512. Compatible with spool model: AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2. SPOOL SPECIFICATION - 30ft 0.065 inches line replacement spool compatible with Black and Decker original spools models AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2. 30-foot trimmer line provides extended mowing coverage. 0.065-inch diameter line offers efficient cutting and durable performance. RUGGED MATERIAL - High-quality automatic feed spool made with durable polyamide nylon thread for flexibility and long service life. Designed to use centrifugal force and aerodynamics for reduced drag and improved cutting efficiency. Durable ABS weed trimmer cap securely holds the spool in place during operation. CONVENIENT AND TIME-SAVING - Easy snap-in installation allows quick replacement without tools. Professionally wound using CNC machine technology for consistent performance, reducing the risk of jams and damage compared to manual winding. PRECAUTIONS FOR USE - Wear safety goggles and long pants when operating the trimmer to help prevent injury. Disconnect power before installing, removing, or changing accessories. This replacement spool is intended for use on light-duty trimming tasks and is best suited for young grass. For heavy weeds, use appropriate tools such as blade attachments.