<b>Product Key Features: </b><br> ※Compatible with Black&Decker string trimmer models: 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. <br><br>Compatible with Spool model:AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2.<br><br> ※These grass trimmer string replacement parts are designed for string trimmers. Utilizes centrifugal force and aerodynamics to reduce drag and achieve fast cutting. <br> ※Premium 30ft 0.065" replacement line is factory wound for a superior feed. The weed eater edger line pliable and flexible allowing for the line to stretch and cushion on impact with hard surfaces. <br><br> <b>Package includes: </b><br> 12x replacement spools<br> 2x trimmer replacement spool cap covers <br> 2x replacement spool springs