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