Features 1、The external diameter is 8mm / 0.3in, the internal diameter is 6mm / 0.2in, and the length is 100mm / 3.9in. 2、Made of high quality aluminium material, all the rustproof tubes have great durability for long use. 3、The sturdy construction makes the tube not easy to deform, ensuring stable supporting while working. 4、Can be used to add structural support to a lightweight chassis, as an axle in a rotating assembly or as a sleeve over a shaft. 5、There is 10 pieces aluminium pipes in the set, and the large quantity will meet your various needs. Specification Item Type: Aluminium Tube Model: 6100-0608-0100; Product Material: Aluminium; External Diameter: Approx. 8mm / 0.3in Internal Diameter: Approx. 6mm / 0.2in Length: Approx. 100mm / 3.9in Application: In the field of robotics, it can be used to add structural support to the chassis. Package List 10 x Aluminium Tube