Air dryer Operating pressure Max.13 Bar Operating temperature range -40--+65 voltage:24v 4 ports:1,21,22,4,changed by clien MAN MB VOLVO DAF SCANIA GEARSHIFT KNOBour company specializes in the business of Air dryers filter, brake relay valves, Thermostats, check valves and gearshift knob valves ,solenoid valve gearbox. HOWO TRUCK WG9100368471