Features 1、8mm/0.31in ID x 10mm/0.39in OD aluminum tubing can be used to add structural support to a chassis. 2、Used as an axle in a rotating assembly, or as a sleeve over an 8mm tube, lead screw or shaft. 3、Universally used parts and components in the robotics field, produced by aluminum. 4、Lightweight and convenient, good quality and low price, really good choice for you. 5、Easy to install, no complicated tools required, convenient and easy for you to use. Specification Item Type: Aluminum Tube Material: Aluminum Model: 6100-0810-0300 Size: 10mm/0.39in outer diameter, 8mm/0.31in inner diameter, length 300mm/11.8in Purpose: In the field of robotics, it can be used to add structural support to the chassis Package List 1 x Aluminum Tube