Fit Models: For Black and Decker GH400,GH500,GH600,GH610,GH900,GH912,NST1018,NST118,NST2018,NST2118,ST6600,ST7000,ST7700,ST8600,MTE220,MTE912,LSTE523,LSTE525(BT),CST1000,CST1200,CST2000,BESTA510,BESTA512,BESTE620,LCC140,LCC221,LCC222,LCC340C,LST136(B/W),LST140C,LST201,LST220,LST300,LST400,LST420,LST522 Compatible Spool Modle : AF-100,AF-100-3ZP,AF-100-BKP,AF-100-2 Specification：Line diameter 0.065inch Per spool 30FT=9.14m Note：Close the trimmer before replacing, installing, or removing the spool Function: Pruning spool allows the thread to stretch and cushion over hard surfaces, more efficiently pruning weeds Compatible Spool Modle : AF-100,AF-100-3ZP,AF-100-BKP,AF-100-2