They are available in four sizes: 8-space, 12-space, 16-space and 21-space. The racks are set upon 4 heavy-duty, 3-inch (75 mm) casters with locking fronts. Each Samson equipment rack includes a single-space, flanged blank panel. 

The truly innovative thing is that the unique steel support bar construction allows the racks to be assembled to accept either the European or US thread sizes. 

• 19-inch equipment racks. 
• Heavy-duty steel construction with fully enclosed sides. 
• 3-inch (75mm) locking casters. 
• Single space blank panel included. 
• Compatible with U.S. and European rack screws.