Collars Multiplex are designed to connect synthetic felts with through pipes, thanks to their smooth flange for joining with synthetic felts and perforated flange for better adhesion to bituminous sheaths. Their pyramid shape covers diameters from 10 to 80 mm (CM10) and from 90 to 200 mm (CM90), with only 2 items. Made of EPDM, they guarantee flexibility even at low temperatures, ensuring long-term resistance to atmospheric agents.