HDD / SSD Adapter Kit for Apple iMac 2009-2011 (20 "21.5" 24 "27") - SATA III Caddy (replaced combo / SuperDrive) + USB enclosure - HDD carrier mounting frame 12.7mm SATA to SATA - TheNatural2020 (Personal Computers)
I have a Samsung Evo 500GB installed with the adapter, iMac "late 2009". The SuperDrive is now in the external casing, looks very fit from a Mac-style. The iMac I opened the safe known iFixIt solution, also the small cups ordered for a few euros