Poweka 2 Air Filter For STIHL FS90 FS100 FS110 FS130 4 Mix Engine  4180-120-1800 Replace Stens  100-705 New high quality aftermarket air filter Fits for STIHL FS90 FS100 FS110 FS130 4 Mix Engine Replacement OEM # 4180-120-1800 Replace Stens # 100-705 Package includes 2x air filter, you will receive exactly what you see on the picture.