Bose Professional Bose FreeSpace 3 Flush-Mount Satellite Rough-In Pan (6-Pack)

FreeSpace 3 Flush-Mount Satellite Rough-In Pan (6-Pack): Six rough-in pans that set FreeSpace 3 satellite positions before the ceiling goes up. Compatible with FreeSpace 3 flush-mount satellite loudspeakers.

Bose specifies it for new-construction hard-deck ceilings. It ships under part number 029853 (FS3F satellite loudspeaker rough-in kit (6-pack)).