Monoprice 108873 Sure Grip PC with TPU Case for iPhone 4/4S - Retail Packaging - Silver Keep a firm grip on your Apple iPhone 4/4S protection with this Sure Grip Case from Monoprice! This two-piece case includes of a flexible TPU (thermoplastic polyurethane) casing that fits over the iPhone 4/4S and provides shock and scratch protection for the top bottom sides and back of the device The bottom has cutouts for the dock connector and the two speaker openings