Dial Size: 2½ inches (63 mm) nominal diameter. Pressure Range: Dual scale 0 to 150 PSI (Outer scale) and 0 to 10 Bar / 10.6 Kg/cm² (Inner scale). Accuracy: ±1.6% of Full Scale Deflection (FSD) (conforms to/ ASME B40.100 Grade B standards). Pointer & Dial Face: Aluminum dial face with micro-fine black graduations over a high-visibility white background; balanced black aluminum pointer. Window/Lens: High-impact polycarbonate glass or shatter-proof safety glass Mounting Type: Bottom Entry / Direct Lower Mount Standard sizes: Typically fitted with a 1½“ Tri-Clamp (Flange OD 50.5 mm) for direct line hookup, or a 2” Tri-Clamp (Flange OD 64 mm)