The Cummins ES Compleat Glycerin Premix Brix refractometer service tool is the perfect solution for testing the concentration of glycerin premix in your coolant. This high-quality tool is designed to meet OEM specifications, ensuring accurate and reliable results every time. Maintaining the proper concentration of glycerin premix in your coolant is essential for the overall performance and longevity of your engine. With this refractometer service tool, you can quickly test the glycerin premix concentration, allowing you to make any necessary adjustments to ensure the quality of your coolant. FleetPride is your First Click in Heavy Duty®.