Product Info: - Part: Engine Heater Hose - Material: Aluminum - Finish: Coated - Coolant Hose Type: Single I.D. (Inside Diameter) - End 1 Attachment Type: Barbed - End 2 Attachment Type: Ring - End 3 Attachment Type: Barbed - Packaging Type: Bag - End 1 Inside Diameter: 0.530 inches - End 2 Inside Diameter: 0.