High quality pultruded carbon tubes in metric sizes. Pultruded carbon tubes are more often used for single line kites with performance in mind and fiberglass or wood is not good enough and some smaller stunt kites. While wrapped carbon tubes are more expensive but can be found in any type of framed kites. If you are replacing parts from an older kite, know if it is pultruded or wrapped you need to replace it with. It is also good practice to replace symmetrically.