Description Genuine STIHL replacement chain to suit STIHL MS 291, MS 311 & MS 391 chainsaws and More High performance saw chain with single-humped drive links. Low kickback, yet extremely high cutting and boring performance. Technical data Value Pitch inch 3/8 Drive link gauge mm 1.6 Drive link thickness 1.6mm/.063" Chain pitch 9.32mm/3/8" Required File size 5.2mm / 13/64" We recommend that you count the number of drive links in your old chain to determine your chain length. The "drive links" are the parts of the chain which sit down inside the guide bar groove. The common sizes for the model listed are as follows - 16" - 40cm - 3/8 = 60 Drive Links 18" - 45cm - 3/8 = 66 Drive Links 20" - 50cm - 3/8 = 72 Drive Links Counting the Drive Links in your old chain and comparing to these sizes ensures that you order the correct chain.
