The MB-35B is a rack mounting bracket designed for 3-unit size.

Finish Aluminum, almite process (black)
Weight 0.11 kg (0.24 lb.)
Accessory Binding head screw M4………4
Flat washer……………………………4
Rack Mount Bracket
List price: $53.60
Price: $43.30
SKU: MB-35B
Catalog: 
Commercial Accessories
Brand: 
TOA
Dimensions: 6 in × 6 in × 4 in
Weight: 2 lb