Features: 1. Compatible for all standard ATX/MATX/FLEX motherboards (with adapter cable required), and supports the maximum motherboard size 305*245mm. 2. 2. Does not compatible for Onda D1800BTC in-line professional bracket motherboard. 3. 3. Long and short graphics cards are compatible, including short graphics card mounting brackets: support all lengths of graphics GPUs. 4. 4. The front of the bracket for locking the graphics card can be locked with 4 12CM fans. 5. 5. You can install 6-8 graphics cards, but it must be equipped with a fan for heat dissipation.specification:Material: SECC Color: Black Size: about 50*28.4*22.2cm No power-on cable and USB, no indicator light Support 6-8 unlimited length graphics cardsPackageList:1* Main Board 1* Large Graphics Card Bracket 1* Small Graphics Card Bracket 2* Side Panel Reinforcement Bar 1 Set* ScrewsNoteWhen installing compatible for Onda D1800BTC motherboard, the last graphics card slot can support graphics cards longer than 25CM, such as compatible for 1060, RX570 graphics cards, the side fixing rod can only be locked outside or unlocked. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.