The 27 AT5 is an Optibelt belt drive system. It consists of a polyurethane round belt with an internal steel reinforcement strand, a polyurethane toothed belt for its drive mechanism, and a polyamide cord for its tensioning element. The 27-200ZA part is a version of this system designed for heavy duty industrial applications. This belt is known for its durability, noise dampening properties, and low vibration. It also has excellent resistance to temperature and oil, making it suitable for a wide range of applications. The length of this portion of the Optibelt system is 200mm, and it has a toothing profile of 5.5mm.