Specifications:Frame Material: ABS PlasticMesh Material: Cold Rolled SteelOuter Diameter: 275mm / 10.83 inchInner Diameter: 236mm / 9.29 inchScrew Hole Diameter: 4 mm / 0.16 inchMounting Hole Distance: 261mm / 10.28 inchFeatures:Great for speaker cabinet, home speaker or speaker.Protect your Subwoofer from cuts, rips, tears and dents.DIY speaker grille, suitable for DIY speakers and cars speaker decorative circle.Package Includes:2 x Speaker Grill Cover