Bose Professional Bose FreeSpace 3 Flush-Mount Satellite Tile Bridge (6-Pack)

FreeSpace 3 Flush-Mount Satellite Tile Bridge (6-Pack): Six tile bridges that carry a FreeSpace 3 flush-mount satellite in a hung-tile grid. Compatible with FreeSpace 3 flush-mount satellite loudspeakers.

Bose specifies it for hung-tile ceilings. It ships under part number 029832 (FS3F satellite loudspeaker tile bridge (6-pack)).