Wide compatibility: Black + Decker models: 82300, 82310, 82312, CST500, CST800, GE600, GE800, GL250, GL310, GL360, GLC500, ST200, ST300, ST400, ST1000, ST3000, ST4000, ST4050, ST440 0, ST4500, ST5000, ST6500, ST6800, ST7600 the streamlined shape allows less drag for more efficient cuts. With the automatic feeding system, the replacement spool makes the tedious work of manually winding the spools by hand. Premium Quality: Made of flexible, flexible braided synthetic nylon co-polymer resin that allows the line to stretch and absorb impact with surfaces Healthier and Greener - It's good for your lawn. It is superior to the standard round line in producing improved cutting action, which helps keep lawns healthier and greener. Package includes: 6 pcs Replace spool.