Other World Computing Internal SSD DIY Kit for 21.5" Apple iMac 2011 Models, Other World Computing iMac to SSD SATA 6Gb/s Cable - iMac to SSD Power.., By OWC - Walmart.com
Apple iMAC 21.5´´ i5 2.3GHZ/8GB/256GB SSD All In One PC Grey| Techinn
Refurbished: Apple iMac 21.5-inch A1418 ME087LL/A Desktop Computer (Aluminum) - 2.9GHZ Quad Core i5, 16 GB DDR3, 256 GB SSD, 1920 x 1080 Display, High Sierra 10.13, Includes Keyboard and Mouse - Grade B - Newegg.com
OWC SSD Upgrade Kits for 21.5-Inch iMac (2013 - 2019)
Apple iMac 21.5” SSD Upgrade (2013-2015) HDD To Solid State Drive (SATA) | Step By Step - YouTube
Apple iMac 21.5" 2013 i5 2.7GHz 512GB SSD 8GB RAM A1418 - A Grade Refurbished | Groupon