This Cannon U-7 Plug is the original (female) connector for the Collins ART-13 Transmitter. This is the female plug which connects to the transmitter. I also have the U-9 Plug which connects to the Dynamotor Power SupplyThese connectors are near impossible to find till now! This Rare and hard to find connector is in excellent condition. There are so few to be found so do not let this one get away!