This is used a great deal on ambulances due to its reduced dimensions and contained cost. The power supply of 12 Vdc, guarantees a constant capacity of 24 ± 3 L/min with a maximum of 0.8 bar. It reaches -620 mm Hg [-24.40 in Hg]. The construction is robust and reliable. The polycarbonate moulded part has holes for the attachment of the pump. Maintenance free. Outgoing fittings with 6 mm [0.23 in] diameter rubber holder. These vacuum pumps are certified for inclusion in a vacuum system.