?DIMENSIONS - ID: 1 (25mm), OD: 34 mm, the 25mm heater hose fits perfectly in your engine's cooling system, ensuring efficient operation. | ?HIGH DURABILITY - Made of EPDM rubber, this 1 inch heater hose withstands temperatures from -40?F to 248?F, ensuring long-lasting performance in extreme conditions. | ?HIGH-PRESSURE TOLERANCE - With a working pressure of 100 psi and a burst pressure of 300 psi, the 25mm heater hose connector offers reliable performance under high-pressure conditions. | ?UNIVERSAL COMPATIBILITY - Engineered to work seamlessly with a wide range of fluids including standard coolant, water, and antifreeze, ensuring reliable performance and easy maintenance. | ?VERSATILE APPLICATIONS - Ideal for various hot water and cooling systems, such as hot water heaters and engine cooling systems, perfect for connecting the radiator to the overflow reservoir.