Anti-vibration spring brushcutter hedge trimmer compatible HUSQVARNA JONSERED Inner diameter (mm): 5,2 Outer diameter (mm): 21,5 External thread (mm): 4,8 Length (mm): 42 For models: HUSQVARNA 445 445 E 450 450 E JONSERED CS 2255 Part No.: 40271660 Original part No.: 537 304601 HUSQVARNA MPM NS