Downlink Antenna Holder DAH-EC135 for mounting on Air Film Camera Systems - EC-135 - utility step mount. The design of the mounting plate allows an easy fixation at the utility step mount, while using Lock-Wire to secure the screws. 2x N-Connector for Video Up/Down Link 2x BNC Connector for Audio- and/or Telemetry Up/Down Link Dimensions L: 4.72" x W: 4.72" x D: 4.52" (12 x 12 x 11.5 cm) Weight: 1.37 lbs (620 g) Of course we also manufacture an antenna holder for your system. Feel free to contact us!