Fit Models: String Trimmer Spools compatible with BlackandDecker 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 longer lifetime. Easy to Use: Trimmer spools replacement with auto feed system can be easily replaced without tools. It is safer more time-saving than manual winding, reduces the damage of the string trimmer, does not get stuck when cutting the grass. Long Service Life: The strimmer wire adopts ABS spool durable polyamide nylon wire, which has good flexibility long service life, can reduce resistance 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.