The be quiet! Dark Base Pro 900 is the newest member of the be quiet! mid-tower chassis family. This mid-tower case sports a tempered glass side panel, a fully modular design, and an abundance of water cooling support. The Dark Base Pro 900 also features filtered ventilation, RGB LED illumination, PWM fan hub, and three be quiet! SilentWings 3 x 140mm PWM fans pre-installed?