Desflurane Vaporizer: Datex Ohmeda Tec 6 Desflurane Vaporizer - Liquid Capacity: 390 ml nominal volume. - Flow Rage: 0.2 to 10 liters/minute - Concentration Range: 1 to 18%. - Flow Resistance: Less than 50 cm H2O at 5 liters/minute; Less than 150 cm H2O at 15 liters/minute. ** Please reference item #210603-2934-09 when contacting us about this listing. Return Policy Items are sold as-is as described and pictured. Most items come with a 7 day option to return and a 30 day limited parts warranty. Feel free to call before you buy. 888-649-6497