Ninth-City 2PCS 3.5" Black Speaker Decorative Circle SubWoofer Grill Cover Guard Protector Mesh Color: Black Height: 8mm Inner diameter: 78mm/3.2inch Outer diameter: 107mm/4.2inch The maximum diameter 107mm/4.21 inch Two screw holes center spacing: 90mm/3.5inch Package includes: 2 x Black Speaker decorative circle Material: Metal cold rolled steel, plastic ABS Finish: black spray