General description CasaFan Fitting piece Sleeve Pipe Collar is designed for quick and easy connections between fitting pieces in ventilation systems. Made from galvanized steel sheet, these collars are suitable for various ventilation system classes and air tightness classes. Technical specifications Material: Galvanized steel sheet Sizes available: M 80 to M 315 Length: 90 mm for sizes M 80 to M 200, 135 mm for sizes M 250 and M 315 Diameter options: 80 mm, 100 mm, 125 mm, 150 mm, 160 mm, 200 mm, 250 mm, 315 mm Compatible with ventilation system classes: I, II, III, and IV Air tightness classes: A, B, and C according to Eurovent Usage These sleeves are used to connect two fitting pieces in a ventilation system efficiently.