Faceplates
The default faceplate (black or white) can be replaced with a range of custom designs, each sold separately. The prices of these custom designs are typically around $20 with more to be released by third party manufacturers. Microsoft has also distributed three promotional faceplates, one for those present at the E3 2005 unveiling, one for those at the Zero Hour launch event and one for VIP X05 attendees. While faceplates exist mostly for aesthetic reasons, it still serves several other functional roles like airflow direction, dust and particle deterrence, and protection for the DVD-tray and memory slots. Note that only the faceplate on the Xbox 360 can be easily replaced and not the other parts of the casing.