What stands out about this unbranded brand is the clean coil marking, which helps you avoid wiring mistakes during setup.
1X DELTROL Controls Relay 375TM 3PDT 24VDC S155D 21014-82
With the black color, the relay blends in well, which can make the whole panel look more cohesive.
You will find that the black color resists showing dust and smudges better than lighter options over time.