There are two kinds of silicone protective cover, one is for universial antenna, and the other is for Fatshark antenna.
As all we know, the mushroom cover is easily broken under high-speed crashes, the antenna will be easily out of shape, this will influence the video transmission distance and quality. With the silicone protective cover on the mushroom head, the mushroom head can be protected by the cover under crashes to avoid or decrease the damage of the antenna.
The weight of the cover is only 2.8g. Add a 2.8g silicone cover, your antenna will be protected. Why not do it?
Silicone Antenna Protective Cover x 1