Check the listing for details. TRU SPEC Prefab Single 8" Subwoofer Enclosure Box Sundown SA 8". Condition: New. Listed at 139.99 USD. Tru Spec Prefabricated enclosures are simple, straight to the point, subwoofer specific enclosures dialed in precisely to manufacturer's specifications after displacements. These subwoofer specific enclosures will be versatile to many other subwoofers as well, so you do not have to use the noted driver on the enclosure, see list below of suitable drivers that will also work well in this enclosure. MADE IN THE USATRU SPEC PREFAB SINGLE 8: Sundown SA 8" with double flush baffleMaterial: 0.75" MDF Specifications:Box External DimensionsWidth × Height × Depth20.00" × 10.50" × 11.26"Material Thickness0.75"Net Internal Volume0.65 ft3Tuning Frequency35 HzPort Area9.00 inch2 Cutout Diameter: 7.45"Flush Trim Diameter: 9" Also fits the following 8" Subwoofers and are close to recommended specifications:DC Audio M3 8" SubwooferCT Sounds Meso 8"Skar VD 8" Skar SDR 8"Skar SVR 8"Skar EVL 8"DS-18 Elite Z 8"And many more