NOS worked with experts in precision hole drilling to develop a proprietary manufacturing process for our new Precision SS jets during years of exhaustive research and development. The result significantly raises the bar in terms of jet accuracy and precision and renders all the competition's jets obsolete. NOS is the only nitrous manufacturer to 100% individually flow-test jets. Protect your investment with NOS Precision SS jets! Precision SS Stainless Steel Nitrous Funnel Jets available in sizes .008-.052