The Precedent line of reefers, which includes the S-600, sets the standard in transport refrigeration. Because the S-600 is certified CARB Evergreen, you can enjoy double-digit fuel savings without the need for a DPF, today or down the road. The Precedent platform represents the very latest in transport refrigeration technology, but it’s backed by something that can only be built up slowly over time: Thermo King peace-of-mind.