The OPTIBELT 21 AT5 42-200ZA is a narrow V-ribbed belt made of high quality Polyester-Elastomer-Composite (PE). This belt is designed to keep timing and motion components running smoothly and efficiently. It has been designed for minimal vibration and noise, superior protection for tension elements, and superior protection for pulley grooves. The belt has a length of 200Z mm, a section height of 7 mm, and a top width of 21 mm. It has a tensile strength of 10.8 N/mm, an extension of 33%, and an operating temperature range of -30°C to 85°C. This belt is ideal for use in a wide variety of applications, such as drives in household appliances, automotive components, HVAC systems, and industrial machinery.