The round ducting for ventilation systems consists of pipes with the diameters of Ø100 mm, Ø125 mm and Ø150 mm, with lengths 50 cm, 100 cm and 150 cm, complete with connectors, elbows, tees, reducer couplings, as well as telescopic ducting and pipe clips in sizes matching the ducting dimensions. Flexible ducting and sealing tape complement the range.