A λ/4 Antenna for external installation in the classic fin-shape design. The material used for the fin is slightly elastic to resist external impacts. The material can be painted.
Frequency: 1090 MHz
Dimensions: Length 115 mm, height 83 mm, width 13 mm
Mass: 60 g
Connection: SMA Connector 50 Ω
Original source:
https://www.gliderpilotshop.com/dolba-bd21-flarm-antenna.html