Akasa bluered led case fans 8cm12cm akasa ak 174cb 4blb this 12cm blue led case fan from akasa is a modern looking colourful fan which can be used with a pc case to deliver fresh air the vibrant crystal blue frame and the four blue leds are very distinctive and offer a unique look the leds have an impressive lifespan of 30 000 hours akasa ak 174cb 4blb 12cm blue led case fan