Ice Tubes Unique transparent PVC mailing/storage tubes. 37 inch length with 2Â¾ inch inside diameter. One end of the tube is permanently sealed while the other end allows easy access. The tubes are moisture proof and come with an adjustable nylon web shoulder strap that can clip on or off for convenience and portability. Perfect for students pilots contractors draftsmen architects engineers sportsmen campers boaters. Designed for mailing anything that can be rolled â charts maps blueprints posters etc. Protects against creases bends tears and folds. Sold individually (price is for one tube; picture shows all colors for illustrative purposes only).