Wide Compatibility: Black + Decker Models: 82300, 82310, 82312, CST500, CST800, GE600, GE800, GL250, GL310, GL360, GLC500, ST200, ST300, ST400, ST1000, ST3000, ST4000, ST4050, ST4400, ST4500, ST5000, ST6500, ST6800, ST7600Save Money and Time: Streamlined shape allows for 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 copolymer resin that allows the line to stretch and absorb impact with surfacesHealthier and Greener - It's good for your lawn. It is superior to the standard round line in producing an improved cutting action, which helps keep the lawn healthier and greener.The inclusive package