Galaxy S4 Case, BoxWave [Quantum Case] Metallic Aluminum Reinforced Bumper Cover for Samsung Galaxy S4 - Metallic Silver Ultra-slim hard bumper frame protects your Galaxy S4 against bumps and scratches Aluminum alloy exterior provides strong yet lightweight protection Concave side edges design gives you more grip on surfaces Non-conductive foam interior lining prevents your Galaxy S4s signal strength from reducing No screws required means easy installation