... silicone,rubber,plastic,crystal,metal,TPU,aluminium,etc...2.Many different fashional designs for your choice,such as hello kitty,melt ice ... .Various colors vailable to meet your demand,such as white,black,red,yellow,green,gray,pink,orange,purple,ice blue,etc ... be highly appreciated.Here're some styles for your good references: For new arrivals, aluminium protect cover for iphone 4&4S/cell phone case