- The minimum required quantity for Commercial Compound Gauge, Dial Size 4" (100 mm), Mild Steel Powder Coated Case & Brass Internals, Range -760 mmHg to 4.2 Kg/Cm2 with Dual Scale of -30 inHg to 60 PSI, Direct Mounting Bottom Entry, Connection 3/8" BSP (M), Accuracy 2% FSD (JI-117) is 10.
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