BNC Socket/Socket Panel Coupler in an XLR Shell Black Bodied. Professional ""through panel adaptor"" for convenient connection of BNC cables through panel, wall plate or patch panel. Ideal for intergrating equipment with RF connection with other multi-media or broadcast equipment. Same panel cutout as industry standard unified XLR shell, front mounting with countersunk panel mounted screw holes. The BNC socket is 75ohm impedance. Please note for silver version go to EH-1100. Switchcraft part no: EHBNC2BX