This Dell OptiPlex 7040 790 990 3010 7010 7040 9010(and others) SFF 3.5" HDD Tray Caddy DN8MY PX60023 is a high-quality unit that is designed to hold 3.5-inch drives. 

It is compatible with a variety of Dell laptops and is made from durable materials that ensure long-lasting use.

The caddy comes in a set of two and is perfect for those who need to store multiple drives.

 The brand of this unit is Dell, which ensures that it is made to the highest standards of quality and reliability. 

It is designed to fit in slim notebooks and is easy to install, making it a great choice for anyone who needs to store additional drives without compromising on space. 

This unit is ideal for those who need to store drives for personal or professional use.