NOS introduces blue and black face nitrous gauges with in-line gauge adapter all in 1 kit. Choose from NOS or Sniper logo versions. These gauges feature easy-to-see color graduations and a white pointer. Liquid filled NOS brand gauges feature an all stainless steel construction. Dry gauges have a stainless steel case with brass internals. Sniper brand liquid filled gauges are constructed of a stainless steel case and brass internals, dry gauges are chrome plated steel case with brass internals.