The Stihl Air Cleaner System is made from a 60 PPI polyurethane foam and TPU flexible printed material by Red Beard Saw. The foam captures more foreign particles and dirt than a gauze or paper filter providing better air filtration for your saw. This filter is designed to fit under the stock cover, and will include fitting instructions. The filter will require oiling and is a great air cleaner to protect your chainsaw.
Stihl is a registered trademark of Stihl Incorporated and is used only to describe their products.