RoadReady 4u 14" Depth Rack Flight Case RR4UED, Built smart with flexibility and comfort in mind, the RR4UED accommodates professional effects units up to 4U. This rugged case is designed to fit all standard 19" rackmountable equipment, features dual rack rails (mounted front and back at a 12 3/8" rack depth) and includes two removable covers for easy access to both sides of your rack. Built for the long haul!