Specifications:Frame Material: ABS PlasticMesh Material: Cold Rolled SteelOuter Diameter: 107mm /4.21 inchInner Diameter: 75mm / 2.95 inchScrew Hole Diameter: 5mm / 0.2 inchMounting Hole Distance: 89mm / 3.5 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:1 x Speaker Grill Cover