This is a replacement io panel and fan cover for this 4u server chassis off of amazon. For my use of the cabinet I wanted to mount an AIO cooler and my desktop pc to get the pc off my desk. I took out the drive bays and fit this bracket. After everything was fit the stock io panel didn't have clearance for the wiring and there was a big hole to the right. The holes fit these buttons and these leds, if your more careful than me you should be able to reuse the leds that come with the case.