The original 1/4. 043 picco chain was the Stihl 3670-71PM3 and this chain was ground breaking in it being the smoothest, thinnest and cleanest cutting chain on the market. Stihl 017, 018, 021, 023, 025, MS170, MS171, MS180, MS181, MS190T, MS191T, MS211, MS230, MS231, MS241, MS250, MS251.
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