This is a restricted solicitation for commercial items, anticipated to result in a firm-fixed price purchase order awarded on a sole source basis to Chelton Avionics Inc. for OEM parts from Cobham Management Services Inc. Only new parts with clear traceability to the OEM are acceptable, and no substitute or alternate parts will be considered. The applicable North American Industry Classification Standard Code is 336413, with a small business size standard of 1,250 employees. The government may increase the quantity of supplies by up to 50 units, with the option exercisable within one calendar year after purchase order award. Performance location is not specified, and no budget amount is provided.