Features:

• ± 2-1-2% accuracy on 2½"; ±1% accuracy on 4"
• acrylic window with membrane assembly
• copper alloy bourdon tube
• brass movement with highly polished bearing surfaces
• glycerin filled
• 2½" face gauges: solid cast brass case with polished ABS cover ring
• 4" face gauges: cast brass, silver painted case with chrome plated brass cover ring
• ambient temperature range: -4°F to 140°F (-20°C to 60°C)