Bose Professional Bose DesignMax DM6C Rough-In Kit (6-Pack)

DesignMax DM6C Rough-In Kit (6-Pack): Six rough-in pans that set DM6C positions before the ceiling goes up. Compatible with DesignMax DM6C loudspeakers.

Bose specifies it for new-construction hard-deck ceilings. It ships under part number 829726-0010 (DesignMax DM6C Rough-In Kit 6 Pack).