1,Good Heat Dissipation: The open chassis design is more conducive to air circulation, is conducive to the heat dissipation of various hardware, and fully releases the internal space of the chassis. 2,Right Space: The ITX computer open case bracket gives you a huge interior installation space, and the split hardware construction makes every millimeter make the most of it. 3,Strong Compatibility: Support ITX motherboard (17x17cm), power supply supports ATX ordinary large power supply, support expansion of a hard disk storage (5 or 5 inches can be installed), support two PCI expansion slots. 4,Easy to Assemble: The computer open case bracket is a bare block frame, light and easy to disassemble, stackable, easy to assemble, simple in structure, you can fully experience the fun of DIY. 5,Open Design: Aluminum DIY bare frame breaks the shackles of traditional chassis structure, further expands the internal space of the chassis, and has a higher degree of free in the open structure. 5 x Aluminum Alloy Bracket1 x User Manual2 x Piece of Paper4 x Foot Pad1 x Power Cable2 x Support Rod7 x Right Angle Connecting Plate2 x Screw2 x Gasket5 x Acrylic Connection Board4 x Black Protective Sheet2 x Gloves1 x 01 Accessories Package1 x 02 or 03 Accessories Package1 x 04 Accessories Package1 x 05 Accessories Package1 x 06 Accessories Package1 x 07 Accessories Package1 x 08 Accessories Package1 x 09 Accessories Package Item Type: ITX Computer Open Case BracketMaterial: Aluminum AlloyApplicable Motherboard: ITX Motherboard (Approx.17 x 17cm or 6.7 x 6.7in)Applicable Power Supply: ATX Ordinary Large Power SupplySupport Expansion Hard Drive Bay: 1 ( 3.5 or 2.5 Inches Can Be Installed)Support PCI Expansion Slot: 2Switch Interface: Start, Restart Switch and Indicator LightBottom Frame Size After Assembly: L315 x W210mm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.