Applications: Ideal for plumbing, heating, air conditioning, pumps, compressors and pneumatic equipment. Pulsation resistant, liquid filled stainless steel case. CRN registered. Warranty: 5 years. Dial: White aluminum with black and red markings. Lens: Polycarbonate. Fill Fluid: Glycerin. Case: 304 SS. Socket: Lead Free Brass. Bourdon Tube: Lead free phosphor bronze C or coil shaped. Movement: Brass. Socket Gasket: Buna N for two-piece internal socket seal. Working Pressure: Maximum 75% of full scale value. Over Pressure Limit: 25%. Ambient Temperature: -4°F to 150°F (-20°C to 65°C). Dial Size: 4” (100mm). Connection: 1/4” NPT Bottom connect with restricted orifice. Accuracy: 1.5% of Full Scale Value. Range: 0-300 psi/KPA