Heavy duty, 16-gauge steel, 19” rack mount - desktop rack cabinet. Panel rails are infinitely adjustable (front to back), round hole punched for 10-32 clip-nuts to full EIA hole centers. Includes two pairs of rails (for rear support of heavier equipment or shelves), rubber feet, black ABS plastic handles, a starter pack of 10-32 clip nuts & screws. Front & back lip is .585" (14 mm) so usable depth is reduced by 1.17" (30 mm).