Description Product Reviews Perforated mounting strap for 8″ speakers Heavy-gauge steel construction with undercoating that eliminates any mechanical or acoustical resonance caused by vibration Rust preventive finish 4 combination knockouts 1/2″ to 3/4″ 4 “J” clips for mounting of baffles Can be used for a back box in ceilings or walls Sold individually 0 Reviews Hide Reviews Product Reviews