GPS case, HDD case, MP3 case material : Nylon+EVA size: fit for your GPS, HDD and MP3. color: have different color available GPS case, HDD case, MP3 case1. make of EVA, it can make different shell according to your request.2. well protect your gps, hdd, mp3 and so on.3. any question, welcome to contact us! GPS case, HDD case MP3 case