Conceptual and 3D DFM (design for manufacturing) for NITROVEND Vending Machine, to replace Generic Air with Nitrogen, in Car Tires. Generic Air is composed of 20% oxygen, 70% Nitrogen + other gases. Oxygen, especially at high temperatures and pressures, is a very reactive element causing Rusting (Oxidization). Tires can run very hot and Nitrogen, a more stable gas, helps prevent spikes in temperature. Oxygen corrodes aluminum and steel wheels, and also reacts with rubber aging the inner liner. As the inner liner ages, more and more air molecules can pass through it, causing more pressure losses. Air migrates through rubber. Car tires can lose 2 psi per month as a result of air leaking through.