Peerless-AV WMJ018 Wall ArmOverview Specifications The single or double wall arms included with Jumbo 2000 Wall Mounts are also available separately. The 1 1 2" 11. 5 NPT threaded fitting accepts our flush mount tube or an extension column. Comes with wood screws. Model WMJ 022CB features a wider wall plate and footprint to help spread the load against a concrete block wall and comes with concrete anchors. General Information Manufacturer Peerless Industries, Inc Manufacturer