Product descriptionItem Package Quantity:10Fits multiple Black Decker string trimmer models: LCC140 GH400 GH500 GH600 GH610 GH900GH912 ST6600 ST7000 ST7200 ST7700 ST7701 ST8600 ST9000 CST1000 CST1100CST1200 and more1.Compatible with Black Decker Trimmers: Designed for use with Black u0026 Decker auto feedstring trimmers This spool and cover are Black u0026 Decker Spool a perfect replacement 30-foot factory-wound replacement spool features a 0.065-inchdiameter line.2. Feed System Replacement: Eliminatestime spent hand-winding string trimmers compatible with BlackDecker stringtrimmer and utilizes centrifugal force to feed the trimmer line as it isneeded.3.Enhanced material: Premium 0.065-Inchdiameter enhanced nylon line supports fast cutting and longer lifetime. (Note: OnlySuitable for tender weed grass. Tough and strong weeds please use blades totrim)4.Packageincluded: 6 replacement trimmer string spool 2 replacement spool cap 2springs