Small diameter, all stainless steel gauge. Dial: 1-1/2" white aluminum with black and red markings. Full view snap-in lens. 1-1/2" Back connection. CRN registered. Regulators require a reliable and corrosion-resistant pressure gauge. Pressure range: 0 - 30 psi/kpa. Case: stainless steel 304. Lens: acrylic, push-in type. Socket: stainless steel 316. Connection: 1/8" NPT male. Bourdon tube: stainless steel 316. Movement: stainless steel 304. Pointer: aluminum, painted black. Welding: silver alloy. Over-pressure limit: 25 percent of full scale value. Working pressure maximum: 75 percent of full scale value. Ambient/process temperature: -40/250 degree Fahrenheit. Accuracy +/-2.5 percent of full scale value. Enclosure rating: IP52.