Zynthonite Armor D1-M
Here we have the third in a series of level one Defensive plates. With 300 armor and taking an armor slot, it is not ideal as a main item. Though it can easily be a good item to put on when a fleet is near max weight. Since Reactive Armor III is the most common special on a base fleet, you will want to consider Diminishing Returns. this will help you know if adding this to a Base fleet is a worth while endeavor.