... 1.Certification: ISO9001:2008 2. OEM available 3. Customizable Bar pressure gaugeDial size:1.5",2.0",2.5",3. ... 0",4.0",6.0"Socket:bottom connection and back connectionConnection thread:NPT , BSP, BSPT and other special specificationBourdon tube ... window Dial plate:Single and dual scale (psi, kpa, mpa, bar, kg/cm2) availableAccuracy:1.6%,2.5%,1.0%