The 21.5" iMac refurbished desktop Computer from Apple is an all-in-one reconditioned desktop with an ultra-slim unibody design. Measuring at just 5mm at its edges, the rebuilt iMac PC has 40% less volume than the 2011 iMac. The LCD display on this all-in-one refurbished desktop is now 5mm thinner, featuring LED backlighting for vibrant, accurate color.