1. the material is 0.5mm SECC2. can be fixed four CD-drivers, one FD, six HDs.3. the back panel and front panel all can be fixed a 8 cm fan4. seven expansion slots5. can be fixed small or big mainboard6. full edge folded7. the side panel can be fixed a 8cm fan, conform to the CPU 38 degree design8. conceal CD-driver, with 1.0 USB+Audio