VACUUM MANOMETER (PRESSURE INDICATORS); PRESSURE RANGE: 300 PSI THREAD DIAMETER: 1/8" NPT; CASE DIAMETER: 40 MM; CONNECTION TYPE: BACK CENTER; ACCURACY: /-2% OF TOTAL RANGE; ELEMENT: 316 STAINLESS STEEL TUB OR BOURDON; CONNECTION: STAINLESS STEEL, 1/8 NPT BACK CENTER; MECHANISM: 304 STAINLESS STEEL; CASE: 304 STAINLESS STEEL; BEZEL: 304 STAINLESS STEEL PRESSURE; WINDOW: ACRYLIC; DIAL: ALUMINUM WHITE BACKGROUND BLACK NUMBERS; HANDLE: BLACK ENAMELLED ALUMINUM; SIZE: 40 MM 1 1/2"; RANGES: DOUBLE SCALE, KG/CM2 PSI