With years of accumulated experience the Jonsbo team has created an outstanding case with the UMX3. It is constructed from an aluminum-magnesium alloy, which imparts a clean and metallic aesthetic. By combining an aluminum exterior with a steel interior, it perfectly fuse the strong structure and great aesthetics. Hidden cooling channels on the bottom and circular tool-less side plates show you the charm of endlessly innovative industrial design.UMX3 is the third flagship of UMX series, it is designed for MATX motherboards. The key breakthrough is optimized support for high-end hardware, with its good stack-based concept in such a small space UMX3 supports high-end dual slots display card with length (up to 320mm), and radiators up to 163mm tall. It supports most top air cooled radiators. Additional a fully transparent acrylic side plate, provides you a wide angle to see the hardware.Model:UMX3 (Window version) Color: Black Dimension: 188 mm(W)358 mm(D)365 mm(H) Material: Body : Built with 2.0mm Aluminium Magnesium alloy; Internal Structure: 1.0+1.2 mm SGCC steel plate+ all black coating processing Motherboard: MATX,ITX Drive Bay: 13.5\",32.5\" Or 42.5\" Cooling system: Top :1140 mm fan (built-in)(140mm radiator can be installed ); Back:1120 mm fan (built-in) (120mm radiator can be installed ) Fan Speed Control: Specialized fan speed control switch CPU Cooler: Not higher than 163 mm Display Card: Not longer than 320 mm Front I/O Port: USB 3.02,USB 2.02,Audio1,MIC1 Expansion Slot: 4 Power Supply: PSII (Modular or non-modular PSU which is shorter than 160mm) Weight: Net 5.45Kg/Gross 7.05Kg