Two way female F connector (usually, but not exclusively, used for satellite) socket surface plate in off white.
This is a two in two out plate, i.e. it is NOT diplexed.
Non-isolated so as to pass voltage to either satellite LNBs or a mast head amp.
As can be seen from the picture (above right) it is screened. The screening can may require the use of a deeper pattress box or spacer plate (sold here).
See article on surface plates.
Occasionally (very occasionally) an alternative plate of equivalent quality may be substituted.