HIPA 25-2 Bump Feed Trimmer Head 10mm x 1.0 LHF for STIHL FS80 FS81 FS85 FS86 FS87 FS100 FS106 FS108 FS110 FS120 FS130 FS200 FS250 Trimmer Weedeater Thread size: 10mm x 1.0 LHF Uses .080", .095", or .105" trimmer line Replace STIHL PMN: 4002 710 2168 / 4002-710-2191 25-2 Autocut Ideal for consumer and commercial use Simple, problem-free indexing mechanism