6.3mm mono plug to 3.5mm mono jack FEV-B197By gerry / February 23, 2021 6.3mm mono plug to 3.5mm mono jack FEV-B197A. 6.3mm mono plug to 3.5mm mono jack;B. 6.3mm mono plug to 3.5mm stereo jackA. 6.3mm mono plug to 3.5mm mono jack; B. 6.3mm mono plug to 3.5mm stereo jack