IO shield for Asrock B450M HDV Rev 4.0 motherboard. Comes in silver, white, or black. 3D printed with a checked and tight fit - it will snap nicely into the case and hold on and seal up the case to airflow - check out the install photo!

Please make sure you know your motherboard model and please have a look at the rear of your motherboard and check carefully it looks like this IO shield.