This is the BNC Male T-adapter. It features a BNC Male connector on all three sides. The adapter is made with a nickel-plated, metal construction for maximum signal strength and durability. The adapter is typically used for connecting between an internal token/ring network. You can send and receive the signal between your network into your device, then back out into the network. It is important to note, however, that any unused ports should be closed off using a terminator. The BNC Male T-adapter is a quick and easy solution for your cabling projects. For more information on our products, please contact our customer service department at 888-519-9505. For all your cable and connector needs, choose Show Me Cables.