Jonsbo team has been working to provide users with a solid and reasonably priced ATX aluminum PCl case. This has been achieved with the U4. The Jonsbo team has created a middle-level full aluminum ATX case for users. THe U4 can support 170mm height CPU radiator, 310mm length high-end display card and 120/240mm cooler. In materials, U4 keeps the same level with high-end case, 2mm thickness aluminum plate is used for the shell, 1.0mm SGCC steel plate is used for the structure, and 5mm thickness full tempered glass is used for transparent side plate, good materials used and reasonable structure design makes U4 a slightly small but with solid structure and reasonable expansibility full aluminum light effect showing case. The outer shell is made from 2.0mm aluminum magnesium alloy.By using outer aluminum and inner steel with innovative structural joining technology, it perfectly fuses the strong structure and great aesthetics. The U4 makes use of full tempered glass for side plate and CNC machine to cut the edge accurately, so the gap between them can be controlled precisely and the edges are smooth. Full tempered glass side plate not only provides wide-angle display for illuminated hardware but also bring a better solution for isolating noise and reducing resonance than traditional case with metal side plate.Model:U4 Color: Black Dimension:205mm(W)340mm(D)428mm(H) Material:Internal Structure : 1.0mm SGCC Steel;Body/ Back/ Right Side Plate :2.0+1.5mm Aluminum; Left Side Plates :5.0mm Tempered Glass Motherboard:ITX / M-ATX / ATX (Within 305mm245mm) Drive Bay:2.5SSD3 + 3.5HDD 1 Or 2.5SSD2 + 3.5HDD2 Cooling Systerm:Front: 2120mm fan (Optional) ;Back: 1120mm fan (built-in);Bottom: 1120mm fan (Optional) Power Supply:Standard ATX PS2(Not longer than 250mm) CPU Cooler:Not higher than 170mm Display Card:Not longer than 305mm Front I/O Port:USB 3.02 / AUDIO1/ MIC1 Expansion Slot:7 Weight:Net 4.8kg