Compatibility: This air filter is compatible with Poulan Pro PP4218 3416; compatible with Husqvarna P3314 3316 chainsaws. OEM: 530057925. Size: The air filter size 91mm x 68mm x 4mm. Function: The air filter effectively prevents dust and debris from entering the engine, ensuring more efficient operation of the chainsaw engine and extending its service life. Material: Made of cotton material, offering excellent filtration performance and durability, effectively improving the chainsaw's working efficiency., Manufacturer: AS Axis Spindleon