These high quality tubes can be used for carrying microfishing rods, tenkara rods, and ice fishing rods. They collapse to 410 mm (16.14") and extend to as much as 610 mm (24"). The inside diameter is 65 mm (2.5"). These tubes also have small holes to let air in and out so you don't store your rods wet. If you have a rod that you care about, you'll want a tube like this to keep it safe. They're really great!