Product Details: 

• Glycerin Filled Gauge
• Made by Pentair
• Hypro Part # WGG600C 
• 0-600 PSI
• 2 1/2" Dial Size
• 1/4" CBM Stem Size with U-Clamp
• 1/4" NPT Brass Connection
• Case made from 304 Stainless Steel
• Brass Movement with Black-enameled Aluminum Pointer
•  Phosphor Bronze Bourdon Tube 
• White Background Dial with Acrylic Window
• Filled with 99.5% Pure Virgin Glycerin 
• ASME/ANSI B40.1 Grade B (3-2-3%) Accuracy