The item shown in the image is an industrial air-oil separator element or cylindrical filter cartridge.
Key Characteristics & Construction:
Filter Media: The yellow, wrapped ribbed material is a fiberglass or synthetic needle-felt cloth designed to trap fine micro-droplets of oil or dust.
End Cap: Features a heavy-duty metallic base with an ornamental or functional pattern designed to sit securely inside a filter housing, flange, or separator vessel.
Application: Components like this are heavily used in industrial air compressorsto clean air and remove lubricating oil from the compressed air stream, as well as in major commercial dust collection systems