HV 90.6 (060107_6) Vacuum and pressure pump, aluminum version, reversible from vacuum to pressure measures. Single hand operation, all metal construction. High quality compound gauge with protective rubber cap DS 63 mm (2 1/2"), dual precision scale, negative range -1 - 0 bars, positive range from 0 - 3 bars/42 psi, graduation 0.05 bar. Includes bilateral conical brass adapter and 4 plastic connecting adapters, plus a 120ml collecting tank.