This is a very lightweight high-performance 915MHz antenna by RUSHFPV that only weighs 1.7g. You can use it as a replacement antenna for your Crossfire. Comes with a U.FL connector.
Specifications
Weight: 1.74g
Length: Approximately 64mm
Width: 5.7mm
Height: Approximately 50mm
Connector: U.FL
Includes
1 x RUSHFPV Crossfire Micro 915MHz U.FL Antenna