Subwoofer or speaker grill

Subwoofer or speaker protection for 8 inch driver.
Measurements:
Guard face:
Outer diameter: 200 mm
Inner diameter: 176 mm
Height: 10 mm
Legs:
Outer diameter: 263.9 mm
Inner diameter: 239.9 mm
Height: 30 mm

Total height (legs+face): 40 mm

Screw holes:
Tread diameter: 3.2 mm
Head diameter: 6 mm
Depth: 8.6 mm