Crimson USA ( is expanding its Aluminum Frame Case (AFC) collection for the iPhone 4/4S with a series of new colors on the same lightweight and rugged design.

The first color to be released in the new finish will be in white, with more new colors to follow. Weighing in at 19 grams and CNC machined from aircraft-grade aluminum and engineering-grade resin, the AFC provides much needed protection without adding significant weight or bulk, according to Crimson CEO Ben Yang.

The frames of the case cover the edges of the front touchscreen and back glassplate of the iPhone 4/4S. The case leaves the camera, as well as all ports and buttons, open and accessible. Pricing for the AFC cases range from US$39.95 to $69.95.