This FS120 air filter is a perfect aftermarket replacement part for STIHL FS120 grass trimmer and brush cutter.

Made of high‑density filter foam/material, it efficiently filters fine dust, grass clippings and dirt particles, preventing impurities from entering the engine and carburetor.

Improves air intake efficiency, optimizes air‑fuel mixture, avoids engine stalling and power loss.

Precision size matches original equipment, easy to install and replace, durable for long‑time outdoor use.