[Spool Specification]: Compatible with BLACK+DECKER spools with cap covers, 30 ft, 0.065 inches. Fits original spool models AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2. [Professional CNC Wound Spool]: Precision-cut and wound using CNC machinery for consistent performance and automatic line feed. Eliminates issues associated with manual winding, such as tangling and uneven line distribution, ensuring smooth operation and reduced risk of trimmer damage. [Durable Construction]: Constructed with high-quality ABS spool housing and durable polyamide nylon cutting line. Offers flexibility, impact resistance, and extended lifespan. Utilizes centrifugal force and aerodynamic design to minimize drag and deliver efficient cutting performance. [Usage Guidelines]: Always wear appropriate personal protective equipment when operating the trimmer to prevent injury from flying debris. This product is designed for use on light grass and small weeds. For heavy-duty cutting tasks or thick brush, use alternative cutting tools such as blades. [Compatible Models]: Designed for use with BLACK+DECKER string trimmers including GH900, GH600, LSTE525, LST300, BESTA510, LCC340C, LST522, ST8600, ST7700, ST7000, ST6600, NST2118, NST2018, NST1118, MTE912, MTC220, LSTE525BT, LSTE523, LST420, LST400, LST220, LST201, LST140C, LST136W, LST136B, LST136, LCC222, LCC221, LCC140, GH912, GH610, GH500, GH400, CST2000, CST1200, CST1000, BESTE620, BESTA512.