Into the “air” category we present several versatile profile models suitable for closures, blocking, regulators and rotors for air flow generation and management systems, such as fans and air filters, air conditioners, air generation machines, pipes, ducts and more. In particular, this version is the ‘type 4’ air conditioning profile. This is a galvanised profile used in ventilation systems. It has a slightly off-centre hooking semi-ring, and has a bent-wing on one end, and on the opposite side it ends with a 90° angle. It is especially suitable for closure and blocking and smoke protection air systems. Dimensions, material and treatments are determined on the basis of customer requirements.