Compatible with: BESTA510, BESTA512, BEASE620, CST1000, CST1200, CST2000, GH400, GH500, GH600, GH610, GH900, GH912, LST120, LST136, LST140, LST201, LST220, LST300, LST400, LST420, LST522, LST1018, LSTE522, LSTE523, LSTE525, NST1018, NST1024, NST1118, NST1810, NST2018, NST2118, ST7000, ST7200, ST7700, ST7701, ST8600, ST9000 Auto Feed System replacement spool eliminates time spent hand-winding string trimmers Each spool is pre-wound with a 30-foot, 0.065-inch diameter, high-strength, durable nylon thread. Compatible with most BLACK+DECKER automatic feed trimmers, Perfect replacement of the original model: AF-100 series, Easy to install. Professional wound for maximum reliability,OEM trimmer line,Perfect matching B&D Genuine parts quality. Contains 3 Spool Line & 1 Cover Cap Made by WETOOLPLUS, one of the most trusted brands for Garden Power Tools & Accessories. The WETOOLPLUS 0.065 in. Replacement Trimmer Line Spool for Black and Decker Grass Hog String Trimmers features 30 ft. of 0.065 in. replacement line. Compatible with Black and Decker GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7700, ST8600, CST1000, CST1200, CST2000, MTC220, MTE912, LST522, LSTE523, LSTE525, NST2018, NST1118, NST2118, LST140C, LST220, LST300, LST400, LST420, LST136, LST136W trimmers. Put your mind at ease when you use WETOOLPLUS Professional replacement parts.