["Description:\nbrand new and high quality\nFeatures:\nMade of high-quality material, durable, firm and stable for us to use.\nThe radiator, also known as the passive speaker, is used to replace the inverter.\nIt has low frequency diving depth, faster speed sense, and low wind noise.\nSo it's a good choice for friends who like to dive deep, but have higher requirements for speed to make subwoofer with radiation basin.\nThree sizes optional. Easy and convenient to use.\nAttention: it is not a speaker, no magnet, it can make sound independently.\nPassive Radiator only, other accessories demo in the picture is not included!\n\nSpecifications:\nItem Type: Passive Radiator\nMaterial: Plastic=Metal\nSize: (Optional)\n5 inch: outer diameter: 147mm/5.7in, opening hole: 132mm5.1in, diagonal twisting hole spacing: 138mm/5.4in\n6.5 inch: outer diameter: 178mm/7in, opening hole: 160mm/6.2in, diagonal twisting hole spacing: 168mm/6.6in\n8 inch: outer diameter: 217mm/8.5in, opening hole: 198mm/7.7in, diagonal twisting hole spacing: 208mm/8.1in\nColor: Black\nQuantity: 1 Pair\n\nNote:\nTransition: 1cm=10mm=0.39inch\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Includes:\n1 Pair x Passive Radiator"]