This part replaces obsolete part #: 4002 710 2108; 4002 710 2191; Fit for FS55 FS55R FS56 FS56RC FS70 FS70R FS80 FS85 FS90 FS90R FS91R FS94R FS100RX FS120 FS130 FS240 This Funhoon FS56RC Trimmer Head Includes 10mm x 1 LHF Bolt Size; Comes pre-loaded with .095"(2.4mm) line for immediate use, Can Use .080", .095", or .105" Trimmer Line; The nylon line is automatically adjusted by tapping the cutting head against the ground Fits for FS90R, FS91, FS91R, FS94, FS94R, FS100, FR106, FR108, FS100RX, FS110, FS111R, FS111RX, FS120, FS240, FS250, KM55, KM56, KM85, KM100, KM110, KM120, KM130, KA85, KA85R, KR85, FS-KM, FS130, FS130R, FR130T, FS131, FS131R, FS200 (From 1997) String Trimmers Package Includes: You will get as pictured Gear Head For Stihl FS55 FS56 FS70 Brushcutter Part Number 4144 640 0100 4144 640 0102