REPLACEMENT SPOOL INSERT FOR TRIMMER HEAD 25-2 AND 27-2 REPLACES 4002-713-3017. FITS 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 FS550K