["Description:\nbrand new and high quality\nFeatures:\nMade of high-quality material, durable, firm and stable for us to use.\nIt is mainly used to strengthen the . The enhancer is convenient for debugging. A suitable diaphragm unit is pasted at the back of each speaker, which can increase the lower potential of the and make the timbre more excellent. The diaphragm is suitable for the use of airtight box to enhance the .\nMultimedia and small size HIFI box use, the effect is improved. The diaphragm is used in a sealed box and cannot be used in a box with air convection. By installing this diaphragm, the cabinet functions as a semi-closed box.\nAttention: This is not speaker. It is for Bass radiator.\nBass Vibration Membrane only, other accessories demo in the picture is not included!\n\nSpecifications:\nItem Type: Bass Vibration Membrane\nMaterial: sponge+paper cone\nSize: (Optional)\nOuter diameter: 5 inch: 127mm/5in, 6.5 inch: 153mm/6.02in, 8 inch: 196mm/7.7in\nColor: Black\nQuantity: 2 PCS\n\nNote:\nNo retail package.\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:\n2 x Bass Vibration Membrane"]