Auction for one instrument air filter by Purolator. Purolator part number 29797. Also shows part number AN 5822-1 This was found in vintage aircraft parts collection and was likely pre-owned in Beechcraft eighteen / C-45 Expeditor type aircraft. Decent looking unit with minor grime. Should clean up nicely. Has been in dry storage for twenty years. Free shipping to USA and Canada. International bidders please email for shipping quotes. Money back within fourteen days if not satisfied. Buyer pays shipping. Canadian buyers must also pay 5% GST Thanks for looking!