Features: 1. This product is a graphics card holder made of high quality metal. 2. Easy to install and strong structure. Support dual power supply. 3. Designed according to standard holes of A-motherboards, graphics cards, hard drives, and power supplies. 4. The product is an empty shelf without fans, switches and lights. 5. Graphics Card Specifications: The minimum length of the graphics card for TYPE A is 14CM, and the longest is unlimited. For TYPE B, is about 160-380mm. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Type A Product Size: 543*246*227MM Motherboard Size: maximum 305*245MM Graphics Card Specifications: the minimum length of the graphics card is 14CM, and the longest is unlimited Power Supply: support ATX power supply, support extended power supply Storage Device: SSD*1+HDD*1 Fan Specifications: 12CM fan*4 Product Material: 1.5/0.8 surface sprayed with sand texture black Standard Screws: 9PCS hexagonal column, 11PCS motherboard screw, 26PCS hexagonal screw (Fixed rack 12PCS, fixed graphics card 8CPS, fixed power supply 4PCS) Packaging: 560*260*40MM Gross Weight: 1.8KG Standard boot line Type B Product Size: about 500*268*240mm Graphics Card Space: Support 6 cards, with a spacing of 81mm, Power Supply: ATX motherboard, ATX power supply, Graphics Card Specifications: 160-380mm Power Specifications: 140-240mm Storage Device: SSD*1+HDD*1 includes: 1 X Mining Case Rack (Need to assemble by yourself.)