Aivon BNC (or SMA)-box is a BNC (or SMA) jack-to-jack interconnecting box with pads for surface-mount components (size 0603)
SMA Box.
Length without connectors 35.0 mm (with connectors 50.6 mm). Width 15.1 mm, height 10.2 mm.
SMA Box opened.
BNC box has two different topologies for surface-mount components.
Backside of BNC box.
Length without connectors 39.2 mm (with connectors 64.9 mm). Width 17.6 mm, height 12.0 mm.