ANDREW~Base Side Mnt Outrigger Fiberglass Outrigger Assembly for 3 in (76.2 mm) OD round members. This can be used on large side-mounted omni antennas. It is 123" (3.1m) long and attachable to the tower legs via one set of included DB375 clamps.can be used for larger side-mounted fiberglass antennas with 2-inch O.D. radomes. Two optional 14-inch tie wraps can be used with this outrigger to provide additional support for the antenna.