General description Pack Air Filter for Stihl Weed Control Lawn Mowers is an OEM replacement part designed to ensure optimal performance of your equipment. This high-quality factory filter conforms to OEM standards, providing reliable filtration for your Stihl lawn mowers. Technical specifications OEM Replacement Code: 4180-120-1800 Dimensions: 2 5/8" length x 3" width x 1/2" height Quantity: 5 air filters included Compatibility and accessories Compatible with Stihl models: FS90, FS130, HT101, FS87, FR130T, HT100, HL100, HL90, HL95, HT130, HT131, KM100, KM110, KM90, SP90 Other information Packed separately for easy storage.