CoAx plus F connector socket surface plate in off white.
This is a two in two out plate, i.e. it is NOT diplexed (see diplexed surface plate).
Non-isolated so as to pass voltage to either a satellite LNB 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.