Rami AV-22 Transponder / DME Antenna
The AV-22 is a monopole L Band Antenna (XPDR and DME Frequencies 1030-1090 MHz) that is rated to 350MPH and 50,000 ft.
Drag Force of 0.41lb @ 250kts.
Single hole mounting and BNC connector.
They also work well as a cellphone antenna.