Black & Decker RC-100-P Replacement Spool Cap & Spring For AFS Trimmer: * Replacement spool cap and spring * For use with AFS models GH400, GH500, CST1000, CST2000, NST2018, ST7000, ST6600, and ST7700 * Automatic feed spool * 3.5 in x 1.5 in x 3.5 in * Carded