Lowell LBS8, Square Hole Tile Bridge for 8" SpeakersThe LBS8 tile-bridge distributes the weight of a speaker assembly to the ceiling support structure in a suspended 2x2 or 2x4 tile ceiling, reducing the likelihood of tiles sagging under the weight of the speaker, and helping to maintain the overall aesthetics of the installation. Tile-bridges are often required by local building codes for safety purposes. The LBS8 can be used with or without a backbox depending on local building codes and the style and weight of the speaker assembly.FEATURES: Formed construction, lightweight, rigid support 24-gauge galvanized steel 23.75 in. x 15.5 in. 8.5 in. square opening in center Multiple formed ribs for strength Multiple attachment points, wire holes at corners for seismic anchoring where required by code, Twist ‘n Lock hardware-free mounting For Driver Size: 8 inch For Grille Type: Screw-mount grille (with or without backbox) or torsion grille (with backbox)