MTC-CBT-FM1 is a low-profile, close-to-wall mounting bracket for use with JBL CBT 70J-1 and CBT 70J-1/70JE-1 array line array column speakers. For mounting speaker in typical vertical orientation (not for horizontal orientation). ROHS-compliant zinc plating for weather resistance. Use one or two for a single cabinet. Use one on each cabinet for 2 cabinet arrays. 3.5 mm thick (10-Gauge AWG) metal. Bracket assembly spaces back of speaker within 20 mm (0.77 inches) of wall (typical).