- 12 cm front coolling fan - Adequate expansion support 4 x 5.25" external and 2 x 3.5" external / 5 x 3.5" internal bays - Bent-in edges ensure safety assembly Provide excellent thermal solution (PCI-Express ventilation holes and air guide) - Safe and easy design for component upgrade and maintenance - Standard ATX tower, support ATX, MicroATX and Flex ATX MB