This unbranded relay comes with a clear plastic cover, so dust stays out and you see the internals easily.
4-20mA Signal Isolator 0-10v to 4-20ma Signal Converter Isolator DC24V Isolator
A nice touch is the gentle tension in the terminals on this unbranded relay, which grips wires without crimping them hard.
A nice touch is the heavy duty rating printed clearly, so you know it is ready for demanding circuits.