I noticed the black housing looks clean on the rack and doesn't catch light in distracting ways.
MINILEC WTR D1 TEMPERATURE RELAY 240VAC FAST SHIPPING
What stands out about the G3P-210B is how the part number stays legible after months in the box.
A nice touch is the 4RD00779404 model on the packaging unboxing a bit more straightforward and clear.
At 70*20*18mm / 2.75*0.78*0.7", the relay is hand-friendly during install.