Product Item Quantity per Pack: 10 [Fits Multiple Black + Decker String Trimmer Models]: LCC140, GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7200, ST7700, ST7701 , ST8600, ST9000 , CST1000, CST1100, CST120 and more 1. [Compatible with Black+ Decker Clippers]: Designed for use with Black Amp; Decker automatic wire cutter, this coil and cap are black amplifiers; Are Decker coils the perfect replacement 30ft factory wound replacement spool with 0.065 inch diameter wire. 2. [FEED SYSTEM REPLACEMENT]: Eliminates time spent manually winding thread cutters, is compatible with Black+Decker thread cutters, and uses centrifugal force feed to cut thread as needed. 3. [Reinforcement Material]: 0.065 inch diameter high quality reinforced nylon wire, provides fast cutting and longer service life. (Note: For soft weeds only. Use a blade to trim stubborn weeds) 4. [Included in package]: 6 nbsp; spare trimmer spool, nbsp; 2 spare spool caps, 2 springs