Segmented ventilation saddle (tee saddle) is used as an element for ventilation T-pieces production. Pressed saddle is also used as a way to branch a circular spiral duct, semi-rigid ducts or flexible sonoduct off a main duct run. Spun radius improves airflow and energy efficiency in ventilation system. An end is equipped with EPDM rubber seal that provides air-tightness class D according to EN 12237 (SITAC certificate). Small collar has only 5-7 mm, it is used for mounting on spiral duct, which requires careful assembly, however the amount of material used determines a low price.