Description If you're tired of messing with trimmer line, this simple and convenient Spools is the solution for your trimmer. Simply remove the old spool, replace it with one of the new pre-wound spools and you're ready to get back to work. Pliable and flexible, it allows for the line to stretch and cushion on impact with hard surfaces. Feature - Color: Black- Material: ABS, Nylon.- Size: 6.4x6.4x2.8cm/2.51x2.51x1.1inch- Replace old or broken line with a new one.- Easy to use and install, and save you time and energy.- Sturdy, firm, not easy to break.- Made of material for lasting use.- Compatible with BLACK DECKER GH400, GH500, GH600, GH900, GH912, ST6600, ST7000, ST7700, CST1000, CST1200, CST2000, MTC220, MTE912, NST2018, NST1118, NST2118, NST2118, LST220, LST 300, LST400, LST420 and LST136 grass trimmer.Packing list: 6 x Replacement Spool