4" diameter pressure gauge.
Stainless steel case and bezel, copper alloy internals features 0/10,000 psi stainless steel case brass internals 1/2" npt lower mount glycerine filled pressure gauge polycarbonate lens accuracy 3-2-3% ambient temp 30 f to 160 f Pic Gauges 4" Pressure Gauge, Liquid Filled, 10,000 PSI, Stainless Case, Lower Mount, 201L-402U.Glycerine filled for added durability in applications where vibration or pulsation is present.