Mounting Gland Material Stainless Steel Includes Graphite Bushing Jam Nut Washers For Use With Series 160 Stainless Steel Pitot Tube Series 160F Straight Stainless Steel Pitot Tube Series 641 Air Velocity Transmitters Series 641RM Air Velocity Transmitter with Remote Probe Series 657 Relative Humidity/Temperature Transmitters Compatible Brand and Series Dwyer 160 Dwyer 160F Dwyer 641 Dwyer 641RM Dwyer 657 Accessory Type Mounting Gland