Bose Professional Bose FreeSpace 3 Series II Bass Module Tile Bridge (6-Pack)

FreeSpace 3 Series II Bass Module Tile Bridge (6-Pack): Six tile bridges that carry a FreeSpace 3 Series II bass module in a hung-tile grid. Compatible with FreeSpace 3 Series II (3BF) bass modules.

Bose specifies it for hung-tile ceilings. It ships under part number 029854 (FreeSpace 3BF bass loudspeaker tile bridge (6-pack)).