Features: 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 ATX 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 (305 x 244mm), power supply supports ATX ordinary large power supply, support expansion of a hard disk storage (3.5 or 2.5 inches can be installed), support 4 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. specification:Item Type: ATX Computer Open Case Bracket Material: Aluminum Alloy Applicable Motherboard: ATX Motherboard (Approx.305 x 244mm / 12 x 9.6in) Applicable Power Supply: ATX Ordinary Large Power Supply Support Expansion Hard Drive Bay: 1 (3.5 or 2.5 Inches Can Be Installed) Support PCI Expansion Slot: 4 Switch Interface: Start, Restart Switch and Indicator Light Bottom Frame Size After Assembly: Approx.422.5 x 248mm / 16.6 x 9.8in PackageList: 6 x Bracket 4 x Foot Pad 7 x Right Angle Connecting Plate 7 x Support Rod 1 x Power Cable 7 x Screw 7 x Gasket 7 x Acrylic Connection Board 4 x Black Protective Sheet 1 x Accessory Box 1 x Piece of Paper 2 x Gloves 1 x User Manual 1 x 01 Accessories Package 1 x 02/03 Accessories Package 1 x 04 Accessories Package 1 x 05 Accessories Package 1 x 06 Accessories Package 1 x 07 Accessories Package 1 x 08 Accessories Package 1 x 09 Accessories Package Note1. The chassis needs to be DIY installed by yourself, and you must be patient to assemble it according to the steps in the user manual. 2. Some panels are designed to be disassembled at one time, you need to consider it before starting. 3. The motherboard is ATX structure, the size must be 305MM x 244MM or less 4. Regular maintenance of the acrylic panel will keep the original brightness after tearing the film for a long time.