A 'Spacer 5x12' is a cylindrical component typically used in mechanical or construction applications to create space or distance between two parts. The specifications 5x12 refer to the inner diameter and the length of the spacer, measured in millimeters. This essential item can be made from various materials such as metal or plastic and is valued for its precision and versatility. It aids in the accurate positioning of components in devices, machines, or constructions and prevents unwanted contact between surfaces that can lead to wear or damage.