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, maximum length is unlimited. For Type B, compatible with graphics cards between 160–380 mm. Note: Actual color may vary slightly from the image due to differences in monitor settings and lighting effects. Please allow 1–3 cm variation due to manual measurement. Type A Product dimensions: 543 x 246 x 227 mm Motherboard support: up to 305 x 245 mm Graphics card compatibility: minimum 14 cm, maximum length not limited Power supply: supports ATX power supply and extended power supply Storage device support: 1 SSD + 1 HDD Fan support: 12 cm fan x 4 Material: 1.5 / 0.8 mm steel with textured black surface coating Mounting 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 Standard boot line included Type B Product dimensions: approximately 500 x 268 x 240 mm Graphics card capacity: supports up to 6 graphics cards with 81 mm spacing Power supply: supports ATX motherboard and ATX power supply Graphics card compatibility: 160–380 mm Power supply unit compatibility: 140–240 mm Storage device support: 1 SSD + 1 HDD Package includes: 1 x Mining Case Rack (self-assembly required)