Brooks 5850 E Series 5850EC4BD3EB2A Mass Flow Controller. Locator: 160105-BNG, PB6972-15 (2) UNQ123. Just in case your city is under remote area, additional charges will be requested. Please watch out for the video link on our succeeding emails. Q: CAN I USE MY OWN COURIER ACCOUNT? We will then arrange the booking and pick-up service. A: There was a recent BIG price increase on the post office rates. But if you will insist, please message us for the cost. It is assumed that the units bought from us will be installed and operated by qualified personnel. Q: ARE THERE ANYTHING MORE? A: We think that’s quite long already and we would like to thank you for reading this far. If you have other questions not covered on our above FAQs, please hit us a message.