Our industrial pressure gauges are designed to perform in harsh environments, especially where pressure pulsations, vibration, and shock loads are a problem. Available in liquid-filled or dry execution, our hermetically sealed gauges have a stainless steel case with ventable top fill plug and a crimped ring to reduce the risk of leaks. Our gauges’ reliability and durability make them excellent choices for all your industrial and severe environment measuring needs. General Specifications Execution: Dry or Liquid-filled Dial Diameter: 4" Case Material: Stainless Steel Lens Material: Polycarbonate Wetted Parts: Brass Mounting Type: Center Back or Bottom/Low Connection: 1/4" NPT with Restrictor Dial Face: White background with black markings, the Howe logo, and a black needle. If dual scale, black markings on the outside and blue markings on the inside. (Actual dial faces may vary with a black logo, no logo, or all black markings. These variations have no effect on the accuracy of the product.) Pressure Range: Varies - not all pressure ranges present online. Contact us if you are in need of a specific pressure range and cannot find it here. WARNING: This product can expose you to lead, which is known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov