ELBOW ELEMENT - 90O: A 90o element that can be placed between the start and end points of an air-technical system, for connecting air-technical pipes at right angles to each other. Can be used: in the case of pipe systems with circular cross-section connections, most commonly used in air-technical devices (e.g. fans, hoods, etc.). Characteristics of Gonal Fit&Go system elements: An air-technical element equipped with a special rubber seal on the connection surfaces, which can be used to create a system classified in the highest air-tightness class ("D" air-tightness class!). The advantages of this:- Fast and precise fitting;- Can be installed without tools;- Fixed, displacement-proof rubber seal at the factory;- The position of the fittings can be changed / fine-tuned afterwards without deteriorating the sealing efficiency; - It does not require the use of other solutions that improve/increase the airtightness;- A leak-free system can be created by using them;- Lower noise level resulting from air flow;- High energy efficiency.