iMac 15,1 Retina 5K 27-inch late 20144 gHz Intel Core i732 GB 1600 MHz DDR3AMD Radeon R9 M295X 4 GB250 GB internal SSDCustom VESA mounted iMac. No base.Note there is a faint burn-in on the screen that appears after the same image has been on the screen for a while. And a crack in the bottom right corner of the class that doesnt affect the image at all. If youre interested, Ill include a VESA base or arm for free.