These general purpose relays show up a simple black unit, which keeps the overall appearance tidy and consistent.
4 Pin 500A AMP 12V DC Dual Battery Isolator Relay Start On/Off Car Accessory
Because it is black, the relay looks uniform when you group several units together in a row.
The black color is a nice touch because it helps the relay blend into dark enclosures and backplanes.
What stands out about this relay is the straightforward terminal markings, which save you time when hooking up sensors and controllers.