Original 512GB SSD MZ-JPU512T/0A6 For Apple iMac 21.5-inch A1418 Retina(Late 2013 – Late 2015), iMac 27-inch A1419 Retina(Late 2013 – Late 2015), Mac mini (Late 2014), Mac Pro (Late 2013), MacBook Air
Apple iMac 21.5" (1TB HDD, Intel Core i5 5th Gen., 2.80GHz, 8GB) All-in-One - Silver - MK442LLA-PB-3RC (Late 2015) for sale online | eBay
Amazon.com: Late-2015 Apple iMac 21.5 with 4K Retina Display/3.1GHz Intel Core i5-5675R Quad-Core (21.5-inch, 8GB RAM, 1TB) (Renewed) : Electronics
OWC SSD Upgrade Kits for 21.5-Inch iMac (2013 - 2019)