Radiator Brush (For Cast Iron)Have you ever lost sleep worrying about the cleanliness of your radiators? I know I have. They may not have been cleaned since 1925, what if they explode? Even with the proper motivation the task can still be daunting unless equipped with the proper utensil. This is where the radiator brush for cast iron radiators enters the stage and empowers you to do the job you knew you could. Chim chimney chim chim cheroo Made in Germany.