The Helios FRS-VDS 51 FlexPipe spigot cap is specially designed for oval nozzles with dimensions 51 x 114 mm. Each set includes one cap and one sealing ring, ensuring a secure and airtight seal. This sealing cap effectively closes off unused nozzles in ventilation ductwork, preventing air leakage and maintaining system efficiency and cleanliness. Ideal for use in flexible pipe systems requiring reliable sealing solutions.