0.25" x 6" x 6" Aluminum plates  with 4 (1.25" pipe size) U-bolts at the corners. Fit on the tower Rohn 25 or 45.Easy to install on the Rohn 25 or 45.Just add arms (1.25" OD size) and you can attach dipole, small yagi or both on the each size of the arms.

from 7/15/21. 

2" is available...