The Sector 5s super thin multi-link perimeter frame design is comprised of 8 individual links to create a modular design that allows endless customization or upgrade possibilities. Each of the 8 links are CNC machined from 6061 aluminum billet as well as a proprietary aerospace polymer which maximizes signal strength. A single screw removal system allows the multi-link design to unfold for quick and easy installation. The Sector 5 comes with a genuine super plush Ultrasuede back plate. The finish on the Sector 5 is your choice of Gun Metal, Silver, or Black with our proprietary Flux finish that is satin smooth to the touch. More Sector 5 Details... NOTE: The 8 pin connector port on the bottom of the Sector 5/5S iPhone case has been designed to accommodate the original connector included with the iPhone 5 and additional accessories may not be compatible.