Choose the model Guardian temperature gauge H20 40-120° black 12 V Guardian temperature gauge H20 40-120° black 24 V Guardian temperature gauge oil 40-150° black 12 V Guardian temperature gauge oil 40-150° black 24 V Guardian temperature gauge H20 40-120° white 12 V Guardian temperature gauge H20 40-120° white 24 V Guardian temperature gauge oil 40-150° white 12 V Guardian temperature gauge oil 40-150° white 24 V