ELECTRICALLY OPERATED (Twin Bottles) – -700 mm Hg ± 10 regulable, flutter free vacuum control knob. – 40 Ltrs./min. 50 dB A ± 3 – Bourden type 10 cm Dia 0-760 mm Hg Calibration – Wide mouthed 2 x 2 Ltrs. Self sealing bungs with overflow safety device – Dimensions : 50 x 38 x 70 cms. – Oven baked cabinet. – Weight 40 Kg – 230 V, 50 Hz, 4 ± 0.5 Amps