Small light chainsaw chain. Gives a faster cut given the smaller engine size. Double check your bar is correct as this chain is 1/4″ and .043″ gauge.
This chain ONLY fits Sugihara A4SMB that run 1/4 .043 chain. [Although that’s not completely true as it will fit carving bars that are 1/4 .043 with no nose sprocket] It is not compatible with Stihl 3670-71PM3 or Panther Mini chains.