Stihl 20" chain. 72 drive links, 1.6mm 063 gauge, 3/8 pitch Suits models ms311 039 ms390 ms391 ms400 ms462 ms500i 066 ms660 ms661 ●● PLEASE CHECK BEFORE BUYING AS THERE ARE DIFFERENT CHAINS FITTED TO SAME MODELS. MESSAGE US IF UNSURE●●
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