3.5mm mono plug to 6.3mm mono jack FEV-B195By gerry / February 23, 2021 3.5mm mono plug to 6.3mm mono jack FEV-B195A. 3.5mm mono plug to 6.3mm mono jack;B. 3.5mm mono plug to 6.3mm stereo jackA. 3.5mm mono plug to 6.3mm mono jack; B. 3.5mm mono plug to 6.3mm stereo jack