Description Platt 505 Blow Molded Cases are part of the “make your own case” collection of hard plastic cases that are available in a wide range of sizes and filled with foam that can be customized to fit around any item. These cases are made of high-quality polyethylene in a double-walled design that keeps the case light and durable. The exterior is scratch-resistant and stays looking new through many uses. This is an excellent affordable hard case option.