This hho kit uses the spiral wire hho generator design where the wires are wound around some non conductive material like plastic , acrylic, or nylon.
The user states that the negative wire is aluminum and the negative is stainless steel.
I suspect that the aluminum side will not last more than one thankful of gas before it is about dissolved by the alkaline baking soda electrolyte solution. Aluminum does not handle alkaline solutions well at all and when an electrical current is involved along with heat from the water baking soda solution , the corrosion is accelerated.
I used 316 stainless wire for one hho generator I built and used a little too much baking soda. The 316 wire on the positive side completely dissolved after about 4 tanks of gas.
And a nickel alloy inconel 750 was even worse. It only lasted one tank.
The negative side was unaffected so there is definitely a difference in the chemical electrolysis going on at the surface of each metal electrode.