Valley Industries Series 40 Dual Scale Industrial 600 PSI Back Mount 4" SS Pressure Gauge. These gauges are designed for use with any medium not corrosive to brass or bronze. Liquid-filled gauges are recommended for reducing shock caused by pressure fluctuations or vibration

Features:
• Dial Range (PSI): 0 – 600
• Dial Range (BAR): 0 – 40
• Casing: 4" Diameter
• Movement: Brass
• Bourdon Tube: C-Shaped in copper alloy
• Pointer: Black enameled aluminum
• Dial: White aluminum
• Window: Polycarbonate – temperature compensating
• Case Material: 304 Stainless steel
• Mounting: Back
• Connection Material: Brass
• Connection Size: 1/4" MNPT
• Fill Material: Glycerin (liquid)
• Wetted Parts: Copper alloy
• Weight: 0.75 lbs.