The External Seal Ring is a part used for secure and effective sealing within the transmission piston case. It is made from a flexible material such as rubber and used to prevent the leakage of fluids and ensures that the seal ring remains durable and withstand the demanding conditions within the transmission including high pressures and varying temperatures.Attributes:• Helps to prevent contamination from entering the transmission case and ensures that the internal components remain properly lubricated• Helps to dampen the vibration caused by the movementsApplications:The External Seal Ring is used to ensure a tight fit and effective sealing, preventing the leakage of transmission fluid and withstand the dynamic forces and environmental factors encountered during the operation of the planetary transmission.