The New Sky Shark .380 and .408 wrapped carbon tube have a diamond pattern. They are 32.5". The.380 has an I.D. of .349 and weighs 14.5 grams. The stiffness is comparable to a p300. The .408 has an I.D. of .375, the weight is 16 grams and the stiffness is comparable to a p400. The .380 has a spine deflection of 0.361". The .408 has a spine deflection of 0.290". Ferrules are available. These are great tubes for kites of all kinds and hobby applications.
The .380 tube uses a .350 ferrule which can be found under the ferrule selection.