Detroit Red Wings iPhone 3G / 3GS Duo Shell by Tribeca. $16.99. Give your iPhone a boost of team spirit with this slim, lightweight Duo Shell for iPhone 3G / 3GS. The Duo is laser engraved with a team logo and is made of protective hard plastic with a rubberized finish. The open-front design allows unrestricted access to the touchscreen.. Save 32% Off!