Apple iPod Nano Gen 4 is the fourth generation iPod Nano. It returned to the narrow form factor of the 1st and 2nd Generation model. It was also thinner than the 1G, 2G and 3G. It had a curved aluminum shell and glass screen. After long-time use, some of the parts of your iPod Nano Gen 4 may become broken, and you might have to repair them. Then ETrade Supply could be your ideal choice to get the iPod Nano Gen 4 replacement parts.