TBS Crossfire, Immortal T antenna standoff. This mounts on standard aluminum standoffs to allow the Immortal T antenna a little more clearance between the frame. It provides 13mm of spacing behind the aluminum standoff to allow clearance for the Immortal T antenna. Use either in the dropdown configuration to allow antenna to be on the same plane as the bottom/top plate, or the offset configuration to set the antenna slightly above. Stand off and antenna are designed to be a tight fit.