For use with retrofit telephone; coax; or network installations; where an electrical box is not present. Seats wall plates that are flush with the mounting Surface. Adjusts to fit 1/4” to 1” thick wallboard; paneling; or drywall.& & 3Gang Certifications: UL and CSA Listed.& & The color indicated can vary in tone and/or hue between production runs and manufacturing facilities. The color of this item may not be an exact match to any other product; even if they are indicated as being the same color; whether sold by Monoprice or any other vendor. Individual pieces may also vary very slightly in color from each other.