REPLACEMENT TRIMMER HEAD BASE COVER REPLACES 4002 713 9708, 4002 710 2168. FITS FR106, FR108, FS44, FS44J, FS44R, FS48, FS50,FS50E, FS50F, FS51, FS51AVE, FS52,FS52AVE, FS52AVRE, FS55, FS55R, FS56AVRE, FS60, FS61, FS61AE, FS61E, FS62,FS65, FS65AVE, FS65AVRE, FS66, FS62AVE, FS62AVRE, FS66AVE, FS66AVRE, FS74, FS74AVE, FS74AVRE, FS76, FS76AVE,FS76AVRE, FS80E, FS80RE FS81, FS81AVE, FS81AVRE, FS83, FS83R, FS85RT, FS86, FS88, FS90(2005 ON), FS90AVE, FS91, FS106AVE, FS86, FS86AVE, FS86AVRE, FS96, FS106, FS108, FS120, FS120R, FS350,FS450K, FS550 AND FS550KWarning:Lead-Nickel-Cancer and Reproductive Harm