Save time and money while meeting new tight-seal building codes! BackBoxx™ patented design protects in-wall/ceiling speakers from harmful moisture and dirt. Keeps loose insulation out of eyes while installing in-ceiling speakers. Maintains vapor barrier integrity to meet new "tight building" codes. 'Bulls-eye' design lets you make more accurate speaker cuts on retro-fits. 3-1/2" depth to accommodate most in-wall speakers.