Thermoid Bulk Auto Heater Hose is a durable and reliable hose designed to meet SAE 20R3 specifications. Made with polyester reinforcement, it effectively handles corrosive solutions and additives while resisting engine heat and weathering to ensure a long, trouble- service life. Available in various sizes, each hose comes in a convenient 50-foot length and is packaged in a box for easy storage and use. This hose is an excellent choice for maintaining your vehicle’s heating system with confidence and durability. Model Number: