External Diameter: 3.0mm Internal Diameter:1.5mm Length:300mm Material: 100 Percent Pure Carbon Fiber Package Includes: (8 pcs) 3.0mmx1.5mmx300mm carbon fiber tube(pultruded) Notice:Pultruded tube's hole can not be perfect center,please kindly understand that Application:Widely used in RC model , agricultural equipment, kite, handicraft, tent, windmilland so onAbout CNCARBONFIBER:We are a professional carbon fiber supplier, customize item inquiry is welcome.