Check the listing for details. M2 - Firestik Molded Plastic Side Mount for Antennas. Width: 0, Condition: New. Listed at 18.64 USD. This mount is designed to mount a CB antenna to a flat vertical surface with the cable attaching on the opposite side of the surface from the mount. This makes it simpler to run coax into a vehicle. Installing this mount does require holes to be drilled.Specifically Designed for Vertical MountingAttractive Black FinishAll Connections are Sealed after InstallationAll Installation Hardware IncludedSupplied Rubber Gasket Seals the Connections and 2 Required HolesInstallation Notes:Mounting Surface Area: 3.125" (79mm) x 1.675" (43mm)Upper Mounting Hole Diameter: 13/32" (10mm)Lower Mounting Hole Diameter: 13/64" (5mm)Mounting Holes, Center to Center: 1.50" (38mm)Outward Protrusion From Mounting Surface: 1.88" (48mm)Maximum Mounting Surface Thickness: 0.28" (7mm) Need more length on the bolts add Motorhome Extension Bolt Kit to your order.Coax A CB coax with lug connectors (hoop connectors) is recommended for this mount. For an easier install, use this FireStik CB antenna coax. We also have this mount available in a molded side mount kitAntennas This mount can hold antennas up to 3 feet tall. It can hold lighter antennas like the Firefly and Road Pal antennas up to 4 feet tall. This mount acceps 3/8 x 24 threaded CB antennas. A CB antenna spring is recommended for this mount.