- 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