This is a flexible holder for the Emax Hawk 5 Vtx and Rx antenna. Designed to flex in the same axis as the Vtx pigtail cord passes through and relieve virtually all stress on the UFL connector of the pigtail cord.
It is intended for hex mounting. The TBS mount is also available.
The standoff distance between the center is 31.5 mm. The holder is very flexible and will almost certainly fit drones with different standoff distances.