The International And Bluebird 3 Row Downflow Radiator is a practical and reliable solution for various models including 3000, 3600, 3800, 4100-4400, and 7300-7700. With its solder together construction and copper and brass construction material, this radiator ensures durability and efficient cooling. It features a 30 1/2 inch core height, 12 1/8 inch core width, and 2 1/16 inch depth, making it suitable for most Bluebird and International models. With OEM and aftermarket numbers like 558516, 6400-59AT, and 640059ST, this radiator is a perfect fit for your vehicle.