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, ensuring reliable performance. 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 Air tightness class: A, B, and C according to Eurovent Ventilation system class: I, II, III, and IV Other information Sizes correspond to standard pipe diameters