This image shows a 4RU Over Bridge Rack. The Over Bridge Rack is designed to be placed on top of the shelf. It is secured by screws through the shelf from underneath and strong enough so that the heaviest of studio monitors can be placed on top with confidence.
Included with each rack are 12 cage nuts (M5), plastic washers and screws.
Dimensions are: 568mm (22.4") wide x 420mm (16.5") deep x 222mm (8.75") high.
Maximum load rating: 50kg (110lbs)
Also available in 2RU, 3RU, 6RU & 8RU.