Blade chain 3/8-44-1.1mm
Suitable for example:
Stihl MS170D, MS170, 017
The above-mentioned saw models have a standard 3/8 split 12" (30cm) flange, in contrast to the "standard" profile, these models use a thinner drive link ("tooth" running in the groove of the flange) which is 1.1 mm, while the strength of the larger Stihl models is 1.3 mm.