Specification:

Frame Material: ABS Plastic
Mesh Material: Cold Rolled Steel
Outer Diameter: 124mm / 4.88 inch
Inner Diameter: 93mm / 3.66 inch
Screw Hole Diameter: 4mm / 0.16 inch
Diagonal Center Hole Distance: 108mm / 4.25 inch
Package Content: 4pcs 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.