Welcome to the shop! 1. Excellent Heat Dissipation: The open chassis design promotes optimal airflow, aiding in heat dissipation for various hardware components and fully utilizing the internal chassis space. 2. Ample Space: This ATX open computer case provides a vast internal installation area, and the divided hardware design maximizes every millimeter. 3. Strong Compatibility: Supports ITX motherboards (305 x 244 mm), standard ATX power supplies, hard drive expansion (3.5 or 2.5 inches can be installed), and 4 PCI expansion slots. 4. Easy Assembly: The open computer case is a bare frame, lightweight and easy to disassemble, stackable, and simple to assemble. Enjoy the fun of DIY with its straightforward structure. 5. Open Design: The aluminum DIY bare frame breaks free from traditional chassis structure constraints, further expanding the internal chassis space and offering a higher degree of freedom in its open structure. Item Type: ATX Computer Open Case Bracket Material: Aluminum Alloy Applicable Motherboard: ATX Motherboard (Approx. 305 x 244 mm / 12 x 9.6 in) Applicable Power Supply: Standard ATX Power Supply Hard Drive Expansion Support: 1 (3.5 or 2.5 inches can be installed) PCI Expansion Slot Support: 4 Switch Interface: Power, Reset Switch, and Indicator Light Bottom Frame Size After Assembly: Approx. 422.5 x 248 mm / 16.6 x 9.8 in Includes: 6 x Bracket 4 x Foot Pad 7 x Right-Angle Connection Plate 7 x Support Rod 1 x Power Switch 7 x Screw 7 x Gasket 7 x Acrylic Connection Board 4 x Black Protective Sheet 1 x Accessory Box 1 x Paper 2 x Gloves 1 x User Manual 1 x 01 Accessory Package 1 x 02/03 Accessory Package 1 x 04 Accessory Package 1 x 05 Accessory Package 1 x 06 Accessory Package 1 x 07 Accessory Package 1 x 08 Accessory Package 1 x 09 Accessory Package