Features: 1. This product is a graphics card holder made of high-quality metal. 2. Easy to install with a strong structure. Supports dual power supply. 3. Designed to fit standard mounting holes for motherboards, graphics cards, hard drives, and power supplies. 4. The product is an empty shelf without fans, switches, or lights. 5. Graphics card compatibility: For Type A, minimum graphics card length is 14 cm, no maximum limit. For Type B, supports lengths between 160380 mm. Notice: Actual color may vary slightly due to different monitor settings and lighting conditions. Please allow 13 cm deviation due to manual measurement. Type A Product Size: 543 x 246 x 227 mm Motherboard Size: up to 305 x 245 mm Graphics Card Compatibility: minimum 14 cm length, no maximum length limit Power Supply: supports ATX power supply, supports extended power supply Storage Device: 1 SSD + 1 HDD Fan Compatibility: supports 12 cm fans (4 total) Product Material: 1.5 mm / 0.8 mm steel with black sand-textured surface coating Standard Screws Included: 9 hexagonal standoffs, 11 motherboard screws, 26 hexagonal screws (12 for rack, 8 for graphics card, 4 for power supply) Packaging Dimensions: 560 x 260 x 40 mm Gross Weight: 1.8 kg Includes standard boot cable Type B Product Size: approximately 500 x 268 x 240 mm Graphics Card Space: supports up to 6 graphics cards with 81 mm spacing Power Supply: compatible with ATX motherboard and ATX power supply Graphics Card Compatibility: 160380 mm Power Supply Compatibility: 140240 mm Storage Device: 1 SSD + 1 HDD Package Includes: 1 x Mining Case Rack (Self-assembly required)