This is a replacement package of two Mikado VBar Neo Antennas. These antennas can be replaced on the Vbar Neo Gyros & VBar Basic Receivers which feature a single PCB board, commonly referred to as "2nd Generation".
You can identify devices of the 2nd generation in 'My Devices' at www.vstab.info/devices, by the addition of (no VLink) or (VLink). Devices of the 1st generation do not yet have that addition. The change took place around serial no. 20007500, from here on please check for the addition and the internals.
Tech Note: Orignal VBar Neos which have 2 PCB Boards (separate gyro & RX boards), are unable to use these antennas.