STIHL anti-vibration spring for brushcutters, hedge trimmers and blowers compatible WITH MODELS: MS 661, MS 661 C-M, MS 661 C-M W height in mm: 12.00 Air filter design: flat width in mm: 70.00 length in mm: 79.00 Part No.: 176-506 Original part No.: 1144 791 3102 STIHL VR