Product description Zalman has given the K1 Rev. B a Tempered Glass Side Panel and PSU Shroud. The interior of the chassis is completely black to match the rest of the case. In the bottom of the case there is a PSU Shroud for power supplies up to 190mm in length and a modular drive cage for two 3.5" or 2.5" HDD/SSD's. Two additional 2.5" drives can be mounted on the back of the motherboard tray. The minimalist front offers subtle ARGB lighting. While Two pre-installed 120mm fans, an ARGB fan in the rear of the chassis and a ARGB fan in the front ensure good ventilation. The front of the Zalman K1 Rev. B can accommodate a total of up to three 120mm fans, while there is space for up to two 120mm fans in the bottom and in the Top. Processor coolers must not exceed a height of 178mm, while graphics cards can be up to 380mm in length. As a special feature, the Zalman K1 Rev. B also offers options for installing water cooling. The case can accommodate up to three radiators: a 120mm radiator in the rear of the chassis, a 360/280mm radiator in the front and a 240mm radiator in the top. Removable dust filters in the top, bottom and front keep the case dust-free. Inside, stowed spaces along the edges of the housing ensure tidy cable management. model : ZM-K1 Rev-B tag : Computer Cases