With years of accumulated experience the Jonsbo team has created an outstanding case with the UMX4. 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.Color: Silver Dimension:204MM (W) * 426MM (D) * 437MM (H) Material:Body: Built with 2.0mm Aluminium alloy;Internal Structure: 1.0 mm SGCC steel; Motherboard:ATX,M-ATX,ITX Drive Bay:23.5\",42.5\" Cooling system: 1x120mm fan included, top cover fan (optional) Power Supply:PSII (Modular or non-modular PSU which is shorter than 170mm) CPU Cooler:Not higher than 162 mm Display Card:Not longer than 310 mm Front I/O Port:USB 3.02,USB 2.02,Audio1,MIC 1 Expansion Slot:7 Weight:Net 9.3kg/Gross 11.7kg