A nice touch is how the unbranded brand uses a bright indicator LED, so you know at a glance when it's active.
14Pin to 16Pin OBD2 Cable for Cat ET3 Truck Diagnostic Adapter
The black color gives it a neutral presence that doesn't fight with your wire colors or labels.
What stands out about this unbranded relay is that the pin layout is printed right on the top for quick reference.
You will find that this unbranded relay is simple to install, with clear terminals and a compact body for tight spaces.
The black color is a nice touch because it helps the relay blend into dark enclosures and backplanes.