Fit Models: String Trimmer Spools compatible with Black&Decker original spools models: AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2 STC1820PC-GB, 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, GH610, GH500, GH400, CST2000, CST1200, CST1000, BESTE620, BESTA512 Trimmer Spool Line Size: Length 30 feet trimmer line provides a wider range of mowing area. 0.065 inches diameter wearable nylon line supports fast easily cutting and longer lifetime. Easy to Use: Trimmer spools replacement with auto feed system can be easily replaced without tools. It is safer and more time-saving than manual winding, reduces the damage of the string trimmer, and does not get stuck when cutting the grass. Long Service Life: The strimmer wire adopts ABS spool and durable polyamide nylon wire, which has good flexibility and long service life, and can reduce resistance and realize fast cutting What You Will Get: 6 x weed eater spools, 2x spool cap, 2x spring , which effective prevent weeds from getting stuck inside , avoid damage to the weed edger.