1.Abs case / snap on plastic window 2.brass internal PRESSURE GAUGE 3.63mm 4.accuracy 1.6% PRESSURE GAUGEDial size:1.5",2.0",2.5",4.0"Pressure Range:-30-0-10000psiSocket:bottom and back connectionConnection thread:NPT , BSP, BSPT and other special specificationBourdon tube:brass or phosphor bronzeCase:plastic case(ABS case)Bezel:without bezelWindow:snap in plastic windowDial plate:single and dual scale(psi,kpa,mpa,bar,kg/cm2),availableAccuracy:1.6%,2.5%,1.0%