The BK Precision IT-E151 Rack Mount Kit is designed for use with the 1785B, 9120A, 9130B, 9150, 9200, 9801, 8500/B, 8502/B, 8510/B, 8512, 8514, 8518, 8542B, 8600, 8601, or 8602 Power Supplies or Electronic Loads (not included). This kit allows for either side-by-side configuration or single unit configuration where a provided blank is used to fill the empty space. The dimensions for this kit are 5.24 inches by 19 inches in which mounting the main unit in a standard 19 inch rack cabinet is possible.