The Master Box NR400 applies optimal cooling and expandability to a minimalistic, subtle design. With thermal capability at the forefront of features, the front panel and top panel are designed to signify airflow performance in its purest form. Functionality is blended to a compact design by maximizing use of internal space and implementing subtle design elements. The Master Box NR400 features a tempered glass side panel, fastened by thumbscrews on the rear panel, to keep the surface immaculately flush.