Nitrous Express Proton Plus Jet Pack is manufactured on CNC equipment. 0005 of specified jet size. In recent testing, using the same jet size, NX jets out flowed the competition by 35 percent! Thats right 35 percent more flow through the same orifice. The NX jet was designed to be more than just a hole in a piece of brass; its contoured inlet and multi-stepped outlet allow turbulence free flow with no restrictions.