Reference:
BVBFB2
Indoor Wall/Ceiling mount box for BluFi DC (BluFi not included). It allows the installation of HID® Bluvision™ BluFi (DC) Plenum (BVBFLVPW), or HID® Bluvision™ BluFi (xx DC), with P / N.: BVBFBxx in a more aesthetically appropriate way.