Specification:

Frame Material: ABS Plastic
Mesh Material: Cold Rolled Steel
Outer Diameter: 225mm / 8.86 inch
Inner Diameter: 185mm / 7.28 inch
Screw Hole Diameter: 4mm / 0.16 inch
Diagonal Center Hole Distance: 208mm / 8.19 inch
Package Content: 1 x Speaker Grill with Screws

Description:

Distribute screws, make you more convenient installation.
Great for speaker cabinet, home speaker or speaker.
Protect your Subwoofer from cuts, rips, tears and dents.