CRST String Trimmer Replacement Spool Weed Eater Cap Autofeed Trimmer String AF-100 0.065-inch 30ft for Black and Decker String Trimmers 

• [Compatible with Black + Decker Trimmers]: Designed for use with Black & Decker auto feed string trimmers, 30-foot factory-wound replacement spool features a 0.065-inch diameter line.
• [Fits multiple Black + Decker string trimmer models]: LCC140, GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7200, ST7700, ST7701, ST8600, ST9000, CST1000, CST1100, CST1200, CST2000, MTC220, MTE912, NST1018, NST1024, NST2018, NST1118, NST2118, LST120, LST136, LST140, LST201, LST220, LST300, LST400, LST420, LST136, LST522, LST1018, LSTE523, LSTE525, BESTA510, BESTA512, BESTE620
• [Auto Feed System Replacement]: This black and decker weed eater cap eliminates time spent hand-winding string trimmers, compatible with Black+Decker string trimmer and utilizes centrifugal force to feed the trimmer line as it is needed.
• [Enhanced material]: Premium 0.065-Inch diameter enhanced nylon line, supports fast cutting and longer lifetime. (Note: Only Suitable for tender weed grass. Tough and strong weeds please use blades to trim)
• [Package included]: 6 × replacement trimmer string spool & 1 × replacement spool cap & 1spool spring