Comsol 6.3mm Male to 3.5mm Female Audio Plug Adaptor | Officeworks
Can I use a standard 3.5mm headphone for flight training? What's the size of the jack found in an aircraft cockpit? - Quora
Amazon.com: TNP 2.5mm to 3.5mm Adapter Cable (3FT) - Bi-Directional Male to Male 2.5 to 3.5 Subminiature Stereo Audio Jack Extension Converter Cable Gold Plated Headset Headphone AUX Connector Wire Cord Plug :