MacBook Air 4,1 11-inch (Mid-2011) specifications and other info
MacBook Air 13" Mid 2011 Teardown - iFixit
Amazon.com: 480GB 2.5" SSD Solid State Drive for Apple MacBook Pro (15-inch, Early 2011) (17-inch, Early 2011) (13-inch, Early 2011) Laptops : Electronics
Apple MacBook Air 13-inch Summer 2011 review: Apple MacBook Air 13-inch Summer 2011 - CNET
DENTS-Apple MacBook Air 11-Inch Mid 2011 i5 1.6GHz 4GB RAM 64GB SSD macOS Sierra | eBay