They were also very heavily-armed, they had an armament which consisted of 40 Heavy turbolasers, and 40 regular turbolasers, so in total 80, and it also had 20 ion cannons and 8 concussion missile launchers, as well as eight tractor beam projectors.
They had a very reasonable price tag, and unlike the Imperial Star Destroyers, it was only 1040 meters long, which i prefer. They were capital ships that were made by the Republic Engineering Corporation for the New Republic from 15 ABY and onwards.
So, this lovely looking thing right here is a Nebula-class star destroyer.