Welcome to the store!-new and high-quality ABS plastic and metal materialImprove your listening experience, give you more melodious sound.The surface is smooth and comfortable to touch.For your health, replace or clean it every three to six months.2inch/3inch/4inch/5inch/6.5inch/8inch optionalSpecifications:Color: BlackMaterial: ABS plastic and metalSize: approx. 2inch/3inch/4inch/5inch/6.5inch/8inch8 inch:Frame inner diameter: 210 mmDiagonal screw hole center to center distance: 184 mmOuter diameter: 1221 mm6.5 inch:Frame inner diameter: 171 mmDiagonal screw hole center to center distance: 145 mmOuter diameter: 184 mm5 inch:Frame inner diameter: 142 mmDiagonal screw hole center to center distance: 117 mmOuter diameter: 152 mm4 inch:Frame inner diameter: 112 mmDiagonal screw hole center to center distance: 92 mmOuter diameter: 124 mm3 inch:Frame inner diameter: 87 mmDiagonal screw hole center to center distance: 72 mmOuter diameter: 94 mm2 inch:Frame inner diameter: 60 mmDiagonal screw hole center to center distance: 46 mmOuter diameter: 65 mmNote:To avoid an unpleasant feeling in the ear, we suggest you NOT turn up the volume completely.Just turn the level to minimum and make sure you find the comfortable and good level.Please allow 1-3 mm error due to manual measurement. Please make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackage includes:2PCS x Speaker Decorative CircleYour satisfaction is our highest priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!