RIMOWA ALUMINUM IPHONE CASE. Model: The cases are designed for various iPhone models, including the iPhone 17 Pro Max. Material: The cases are made from a combination of materials. The exterior features the brand's signature grooved design in aluminum. The interior and frame are made of a shock-absorbent TPU (thermoplastic polyurethane) to protect the phone. Some sources also refer to the material as a "Magnesium-aluminum" alloy. FOR SELL WA