Thermoid Bulk Auto Heater Hose is a durable and reliable solution designed to meet SAE 20R3 specifications. This hose is polyester reinforced to withstand corrosive solutions and additives, making it i for various automotive heating applications. It resists engine heat and weathering, ensuring a long and trouble- service life. Available in multiple sizes, each hose comes in a convenient box package with lengths of 50 feet, featuring inside diameters ranging from 1/2 inch to 1 inch and corresponding outside diameters to fit your specific needs. Whether you need a smaller size or a larger diameter, Thermoid Bulk Auto Heater Hose provides quality and performance you can trust. Model Number: