McDaniel Controls J6 Series 2 1/2 inch utility pressure gauges have 1/4 inch NPT connections and ranges from Vacuum to 10,000 psi. These are glycerine filled
McDaniel J6 series 2 1/2 inch pressure gauge, 0-10,000 psi, 1/4 inch NPT bottom entry, SS case with brass internals, glycerine filled