12″ Flush MDF F3 Double Subwoofer Mounting Ring Spacer v1

Double MDF Flush Fiberglass Fabrication Subwoofer Mounting Ring 12″ | Cutout diameter = 11.13″ (282.70mm), Outer basket diameter = 12.90″ (327.66mm), Outer ring diameter = 14.40″ (365.75mm)