ANALOG TEST GAUGE TYPE: VACUOMETER; FRONT: OPEN; SENSOR: NO SENSOR; SENSOR MATERIAL: NOT APPLICABLE; BUSHING MATERIAL: SPECIAL COPPER; CASE: STAINLESS STEEL AISI 304; MECHANISM: STAINLESS STEEL; ; DISPLAY: NON-MIRRORED; POINTER: BALANCED DIAL TYPE; PRECISION: 2.50; ZERO SETTING: ON POINTER; CONNECTION: NPT; CONNECTION DIAMETER: 1/4; DISPLAY DIAMETER: 63.00 MM; GRADUATION: 0 TO -1000