Dwyer Series 2000 Magnehelic® Gauge Flush Mounting Kit A-464The Dwyer Series 2000 Magnehelic Gauge Flush Mounting Kit A 464 provides a flush mounting solution for Magnehelic gauge installations for applications such as clean rooms and mechanical equipment rooms. The A 464 can also be used as an alternative means to flush mount Magnehelic gauges on control panel enclosures. The space pressure reference port eliminates the need to drill separate holes and run tubing long distances. (Bottom Left corner). *Gauge