Wide Compatibility: Black + Decker Models: 82300, 82310, 82312, CST500, CST800, GE600, GE800, GL250, GL310, GL360, GLC500, ST200, ST300, ST400, ST1000, ST3000, ST4000, ST4050, ST4400, 00, ST5000,ST6500, ST6800, ST7600 The contoured 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 synthetic braided copolymer nylon 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 an enhanced cutting action, which helps keep the lawn healthier and greener. Package includes: 6 pieces cutting line. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.