Cyclops 2" Diameter Tube Bar Mounts CYC-LBMNT2 for LED Light Bars Pack Of 2.  Adjustable  from 49MM to 54 MM.  50MM inner Diameter with inner rubber non slip pads.  Includes complete hardware.  Can be used to mount various accessories to your 2" roll bars or bumpers.  Shipped USPS Ground Advantage with tracking.