Model : G2531SR Series : G Product Lines : Workholding Tools ± 1.5% accuracy of full scale All pressure sensing parts sealed and dampened by glycerine for long life Includes safety blow-out disk and pressure equalizing membrane to prevent overpressurization Copper alloy, coiled safety Bourdon tube for 1000 psi and higher Dual psi and bar scale readings, 1.5 inch gauge face