OtterBox Symmetry Series - Pro Pack - back cover for cell phone - polycarbonate, synthetic rubber - black - for Apple iPhone 7, 8, SE (2nd generation), SE (3rd generation). You don’t have to choose between a protective case and a stylish one. Symmetry Series is the slim and protective case that inspires your style. All of your phone’s buttons, features and functions work flawlessly. And, Symmetry Series is easy to remove and install. Which is great because with all of the colors, patterns and clear options, you need more than just one. Symmetry Series —slimmer than ever, as protective as always.