These tubes are built using 24K or 48K, 33Msi, medium modulus fiber from a high quality supplier. Braided carbon tubes are generally around 75% carbon on the 0 deg. axis. 15% 90 deg. (hoop) fiber. 10% +/- 45 fiber. Because of the large tows and general nature of a braid, the OD tends to be a little lumpy and bumpy with some pits and voids. The taper is built into the tooling, but a part can be positioned on the tooling to end at a larger ID