This rate of climb indicator from D&B Instruments is a must-have for any aviation enthusiast. It is designed to provide accurate and reliable indications of the rate of climb and descent of an aircraft. The indicator is made by a reputable brand and comes with a manufacturer part number of 516-6-1. This item is perfect for those who are looking for a reliable indicator for their aviation needs. It is suitable for use in all types of aircraft and is an essential part of any avionics system. Please note that this item does not come with a warranty. If you have any questions or concerns about this product, please feel free to contact us.