These are supports for the masts of TV and SAT antennas to be fixed to the wall by the dowel they are endowed with.
The difference among the models is length determining the mounting stand-off of the mast from the wall.
Info
code
612
description
Wall expansion bracket equipped with anchor-bolt M10.
Ø mast<br>
20÷40 mm
finish
ZB
packing
6
use
Suitable for the fixing of masts for small diameter dishes and for TV aerials on plain walls without differences in height.