NEW. OPENED BOX FOR PICS. The MotoRad MT-300 Cooling System Pressure Tester Kit is a reliable tool for testing the cooling system pressure of passenger vehicles. With a maximum PSI of 300, this kit includes fittings, a carrying case, and a color-coded gauge for easy reading. The pressure release bar allows for quick venting, making it convenient to use. Made in the United States, this cooling system pressure tester kit is a must-have for automotive maintenance and repair.