Features: 1. This product is a graphics card holder made of metal. 2. Easy to install and strong structure. Support dual power supply. Type B is stackable. 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 length of the graphics card for Type A is unlimited, and Type B is limited to 280cm. 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: length 500 x height 222 x depth 268MM Motherboard size: maximum 305 x 245MM Graphics card specifications: The length of the graphics card is unlimited. 6 card spacing is 81MM, 8 card spacing is 60MM Radiator: CPU radiator height 75MM Support power supply: A x X power supply, extended power supply Storage device: SSD x 2HDD x 1 Fan specifications: 12CM fan x 4 Product material: bracket 1.5MM, bottom plate 0.8MM, surface spraying, matte black Standard screws: Hexagonal column 9PCS. Motherboard screw 11PCS, Hexagonal screw 26PCS Fixed rack 12PCS. Fixed graphics card 8CPS. Fixed power supply 4PCS Packing size: 520 x 285 x 45MM Product weight: single 2.0KG gross weight: 2.25KG Standard boot line Type B Card slot: 8 cards the length of the graphics card is limited to 280cm Motherboard: A x X Power supply: A x X x 2 Hard Disk: SDD x 1 Cooling fan: 12cm x 4 Chassis size: length 505 x width 345 x height 300 Include: 1 set of screw Package List: Need to assemble by yourself. choice A: 1 x Mining Case Rack 1 x set of screw 1 x set of boot line choice B: 1 x Mining Case Rack 1 x set of screw