Check the listing for details. Brooks MF Series Mass Flow Controller MF531AAA201E40A. Condition: Used. Listed at 850.00 USD. Brooks MF Series Mass Flow Controller MF531AAA201E40A Purchase will include everything pictured. Specifications: Gas: O2 Flow Rate: 200 SLPM Calib. Ref. Temp: 70°C Normally Closed Valve Our business hours are Monday through Friday from 8:00 AM to 4:00 PM Eastern Time. If you have questions, offers, or any other concerns regarding a listing outside our normal business hours, please allow us to respond on the following business day. Any freight items will ship within 3 business days. If the shipment is damaged, please report to the driver immediately, or do not accept the shipment. Please contact us immediately for instructions. In the event you have any issues with your purchase, please contact AFAB first. Customer satisfaction is our highest priority. AFAB offers quality products and equipment that operate as intended, unless otherwise stated. We encourage you to review our feedback. rbb - R1 F3 P70sku - 003388