It is a pipe made of the carbon FRP. Length is 1m, and many kinds of pipe were prepared below. *Length 1000mm: -inside diameter2mm / outside diameter3mm 6g (No.1719) -inside diameter3mm / outside diameter4mm 9g (No.1720) -inside diameter4mm / outside diameter5mm 10g (No.1783) -inside diameter5mm / outside diameter6mm 13g (No.1784) -inside diameter7mm / outside diameter8mm 19g (No.1785) -inside diameter9mm / outside diameter10mm 18g (No.1786) -inside diameter12mm / outside diameter13mm 24g (No.1787) -inside diameter15mm / outside diameter16mm 34g (No.1788) -inside diameter16mm / outside diameter17mm 38g (No.1789)