the word гранит translate to granite,because this tank is as strong as a rock. this tank is the first water powered tank, so how it works is a water molecule has 2 hydrogen atoms, and a hydrogen molecule (which is made of 2 hydrogen atoms) is combustible,and combustion is how a motor in a car works, so the NKF has developed a motor than can produce hydrogen molecules out of water and can combust them effectively that it can power a tank, also the byproduct is excess oxygen which forms into oxygen molecules which make ups ~20% of the Earth's atmosphere so this is actually eco-friendly . the nkf has already begun mass-producing these tanks, they make for good tanks as their fuel is basically all over the place,it even rains from the sky.but it is cramped in the tank . also no , I am not giving this tank to anyone.