33Ensure precision in your engine cooling system diagnostics with the NOS Stant 12026 Engine Cooling System Tester Adapter. Designed to work seamlessly with your existing testing equipment, this adapter is a must-have for accurate readings and efficient repairs. Crafted by Stant, a trusted name in automotive accessories, the 12026 model is engineered for durability and ease of use. It's a singular unit, with the part number 12026, that helps extend the lifespan of your cooling system components by enabling thorough testing and maintenance.