Niles PR6R 6-1/2" 2-Way Performance In-Wall Loudspeaker with Bracket Kit - Pair (White) 6-1/2" Talc-filled Polypropylene Cone Is Extremely Rigid To Reduce Breakup And Lower Distortion Proprietary Tweeter-adjustment Mechanism Ratchets In 1mm Increments And Then Pivots For Precise Aiming Of High Frequencies 3/4" Kaladex Dome With Fluid-cooling And Ultra-wide Dispersion For Clear And Detailed High-frequencies Hole Cutout Dimensions: 7-5/8" X 10-5/8" Frame Dimensions: 8-3/4" X 11-11/16" PR6R Includes Everything Required For Installation