Features 1/4in NPT Thread: The liquid filled pressure gauge has standard 1/4 inch NPT lower mount thread, making it easy to connect and use, and compatible with regulators, HVAC, beer barrels, and more. Applicable Range: This pressure gauge features 2.5 inch dial, compact and lightweight. The measurement range is 0‑3000Psi, suitable for air, water, and oil pressure testing, with strong compatibility. Glycerol Filling: The filled glycerol can suppress pointer vibration, prevent vibration and pulsation from damaging the internal mechanical structure, IP67 Water-proof, will not freeze during normal use. Erosion Resistance: This pressure gauge uses a stainless steel casing and brass connector, with great rust and erosion resistance, suitable for measuring the pressure of non erosion liquids and gases. Excellent Material: With a stainless steel casing, glycerin filled liquid, PC window and brass fitting, this dial pressure gauge has a longer service life and is suitable for indoor and outdoor use. 1. 1/4in NPT Thread: The liquid filled pressure gauge has standard 1/4 inch NPT lower mount thread, making it easy to connect and use, and compatible with regulators, HVAC, beer barrels, and more. 2. Applicable Range: This pressure gauge features 2.5 inch dial, compact and lightweight. The measurement range is 0‑3000Psi, suitable for air, water, and oil pressure testing, with strong compatibility. 3. Glycerol Filling: The filled glycerol can suppress pointer vibration, prevent vibration and pulsation from damaging the internal mechanical structure, IP67 Water-proof, will not freeze during normal use. 4. Erosion Resistance: This pressure gauge uses a stainless steel casing and brass connector, with great rust and erosion resistance, suitable for measuring the pressure of non erosion liquids and gases. 5. Excellent Material: With a stainless steel casing, glycerin filled liquid, PC window and brass fitting, this dial pressure gauge has a longer service life and is suitable for indoor and outdoor use. Specification: Item Type: Liquid Filled Pressure Gauge Material: Stainless Steel Casing, Glycerin Filling Liquid, PC Window, Brass Fitting Measurement Range: 0-3000Psi Thread Mount Size: 1/4 Inch NPT Application: For Air, Water, Oil Pressure Testing packing list: 1 x Liquid Pressure Gauge Note: Dimensional tolerances exist. Package List 1 x Liquid Pressure Gauge