Description: Material: Metal cold rolled steel, plastic ABS. With 4 screws, directly fixed, easy to install. DIY speaker grille, suitable for DIY speakers and cars speaker decorative circle. Protects your subwoofer from cuts, rips, tears and dents. This grille is available in the following sizes,4inch,5inch,6inch and 8inch. Specification: Dimension: 4inch: Outer Diameter:128mm/5.04inch,Diagonal Screw Holes Spacing:109mm/4.29inch,Inner Diameter:93mm/3.66inch,Iron Mesh Diameter:122mm/4.80inch 5inch: Outer Diameter:158mm/6.22inch,Diagonal Screw Holes Spacing:139mm/5.47inch,Inner Diameter:119mm/4.68inch,Iron Mesh Diameter:152mm/5.98inch 6inch:Outer Diameter:188mm/7.40inch,Diagonal Screw Holes Spacing:169mm/6.65inch,Inner Diameter:146mm/5.74inch,Iron Mesh Diameter:182mm/7.17inch 8inch:Outer Diameter:228mm/8.98inch,Diagonal Screw Holes Spacing:209mm/8.23inch,Inner Diameter:186mm/7.32inch,Iron Mesh Diameter:222mm/8.74inch Package Includes: 1 Piece Car Speaker Steel Mesh Cover 4 Pieces Screw(4 Pack) Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.