Description: Join these tubes to make a rod or fishing pole. Made of premium copper material, the tubes are of high strength and durable. Exquisitely processed, smooth surface and thread , easy to join. With screws and small size, it is portable to take and easy to use for your rod building. A good fishing accessory for anglers. Specification: Material: Copper Size: Type 1: Inner Tuber: Length: 4.2cm / 1.65inch, Internal Diameter: 5.4mm / 0.21inch, External Diameter: 5.9mm / 0.23inch Outer Tube: Length: 6cm / 2.36inch, Internal Diameter: 6mm / 0.24inch, External Diameter: 7.5mm / 0.3inch Type 2: Inner Tuber: Length: 5.5cm / 2.17inch, Internal Diameter: 9.2mm / 0.36inch, External Diameter: 10mm / 0.39inch Outer Tube: Length: 8cm / 3.15inch, Internal Diameter: 10mm / 0.39inch, External Diameter: 11.9mm / 0.47inch Type 3: Inner Tuber: Length: 6cm / 2.36inch, Internal Diameter: 11.2mm / 0.44inch, External Diameter: 12mm / 0.47inch Outer Tube: Length: 8.5cm / 3.35inch, Internal Diameter: 12mm / 0.47inch, External Diameter: 14mm / 0.55inch Package Includes: 1 Piece Rod Connecting Tube(2 Pack) Note: Color might be slightly different due to the calibration of different monitors. Please allow slight measuring deviation due to manual measurement.