This product is compatible with, but not limited to, the following systems:

For Dell Optiplex 390 790 990 3010 7010 9010 3020 7020 9020 T3610 T5610 T1700 T1650 SFF MT Mini-tower HDD Hard Drive Caddy BracketCage Cover Tray

>>>>This part is the install 3.5 " hard disk <<<<

The back like this:

Iron spring

Foxconn manufacturing,Good workmanship

Large inventory, Welcome big orders.