Citadel: Heating Unit Stabilizers

Acquisition
Talk to the salarian at the Citadel Embassies, in front of the C-Sec office.

Walkthrough
The heating unit stabilizers can be acquired by two ways:
 * During the mission N7: Cerberus Fighter Base
 * By purchasing them from the Spectre terminal. It's about 900 credits. This option is only available if you didn't pick them up during the mission.

Once you have it, turn them into the salarian in front of the C-Sec Outpost in the Presidium Commons.

Trivia

 * Interacting with salarian later after turning in the stabilizers allows you to overhear his half of a phone conversation. His sister's egg clutch has stabilized, and she wants to name the firstborn after the person who helped them.