Features 1、The inner diameter is 12mm and the outer diameter is 14mm, can be used as a 12mm round sleeve or as a raceway through which wires are passed. 2、Made of aluminum material, the tube is light and strong, not easy to be corroded and deformed. 3、The kit contains 5 hollow aluminum tubes, which are easy to install and replace to meet various support needs. 4、These aluminum tubes are commonly used parts in the robotics field and can be used to add structural support to the chassis. 5、These aluminum tubes are standard in size and long enough to be practical. Specification Item Type: Aluminum Tube Model: 6100-1214-0150 Material: Aluminum Outer Diameter: Approx. 14mm / 0.6in Inner Diameter: Approx. 12mm / 0.5in Length: Approx. 150mm / 5.9in Application: In the field of robotics, it can be used to add structural support to the chassis Package List 5 x Aluminum Tube