Package Included: 12 x Trimmer Spool Line,2 x cap,2 x spring Work with Models: Fit for Black&Decker string trimmer GH400,GH500,GH600,GH610,GH900,GH912,ST6600,ST7000,ST7200,ST7700,ST7701,ST8600,ST9000,CST1000,CST1100,CST1200,CST2000,MTC220,MTE912,NST1018,NST1024,NST1118,NST1810,NST2018,NST2118,LST120,LST136,LST140,LST201,LST220,LST300,LST400,LST420,LST522,LST1018,LSTE523,LSTE525,BESTA510,BESTA512,BESTE620 Specification: 30ft 0.065 inches line replacement spool fi for spools models AF-100,AF-100-3ZP,AF-100-BKP,AF-100-2 MATERIAL: High-quality ABS spool & durable polyamide nylon thread,pliable and flexible and long service life IMPORTANT REMINDERS: Unplug;Turn off all the power before repair for the safety and wear gloves to protect oneself Snap into place for quick and effortless replace without tools.Professional machine cutting and automatic winding is safer and more time-saving than manual winding,reduces damage for string grass trimmer and not get stuck when mowing;