T 90 SERIOUSLY STOP VANDALING It is nothing no do with Ad Homenim The problem is that you are not good at math at all so you can not understand the basic equation 550 250 800 550 for T 90A Basic Armor and 250 mm for Kontakt5 So if T 90A equips the K5 ERA That s 800 mm Do you even know what Kontakt5 is and how Explosive Reactive Armor works