Seamless tempered glass panels seem to be a trend with PC cases lately as more brands are ... The I/O is located at the top of the steel panel and there are three USB ports in total.

This PC case looks very similar to the Corsair 4000D Airflow PC case but is cheaper. The Vetroo AL600 case comes with a tempered glass side panel ... 280mm at the top, and 120mm at the back.