• 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
**Products are in compliance with NDAA Section 889 Part B Guidelines