COMPATIBLITY -- Suitable for Multiple String Trimmer Models: GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7700, CST1000, CST1200, CST2000, MTC220, MTE912, NST2018, NST1118, NST2118, LST220, LST300, LST400, LST420, LST136
AUTO-FEED SYSTEM -- The trimmer replacement spool utilizes centrifugal force to feed the trimmer line as it is needed. The auto-feed system replacement spool eases the tedious work of hand-winding spools.
HIGH QUALITY -- Premium 30ft replacement line with 0.065" diameter easily cuts through grass and weeds. It supports fast cutting and longer lifetime.
FAST CUTTING -- Pliability and flexibility allow the line to stretch and cushion on impact with hard surfaces. Aerodynamic shape allows less drag for more efficient cuts.
WHAT YOU GET -- 8 pcs replacement spool; 1 pc replacement trimmer cap and 1pc replacement spring. NOTE: Only suitable for tender weed grass. Tough and strong weeds please use blades to trim.