Lian Li Manufactured The Metal Boned K7, has the 2-1mm hairline brushed metallic aluminum external finishing and the tough 0.8mm SECC internal structure. End user now can have the best part of the both world. Great thermal solution design for GAMERS! The airflow design for max graphic card cooling with One 12cm exhaust fan in the rear and with fan guard Dual 12cm intake fans with air filter