Check the listing for details. Nitrous Express Flo-Thru Nitrous Pressure Gauge 15508. Color: Silver, Condition: New. Listed at 40.00 USD. This is a new nitrous pressure gauge. Some information from online: Nitrous Express Flo-Thru nitrous pressure gauges are designed to work with your NX system. These high-accuracy, liquid-filled gauges read from 0 to 1,500 psi. They are available individually or in kits with either a 4 or 6 AN billet aluminum manifold featuring two 1/8 in. NPT ports and a 1/8 in. NPT plug. Consistency is key when going fast. Nitrous Express Flo-Thru pressure gauges make sure you are doing just that! Gauge Type:Nitrous pressureOEM Replacement:NoGauge Style:AnalogSending Unit:MechanicalGauge Diameter (in.):2 1/16 in.Gauge Diameter (mm):52mmGauge Range:0-1,500 psiGauge Shape:RoundSweep:Full sweepGauge Face Color:WhiteGauge Number Color:BlackPointer Color:BlackBezel Color:Chrome