The CB44 is an attractive surface mount backbox for ceiling or wall installation of 4-inch speaker in schools, offices, medical facilities, restaurants, hotels and retail spaces. The clean, square design is precision formed from 20-gauge steel with welded seams and includes 1/4-inch thick acoustic foam pad. The rear also has 0.375-inch hole for wire access. Front has formed flanges with U-clips to secure 7-inch square screw-mount grille.