Collars Multiplex are designed to connect synthetic felts with through pipes, thanks to their smooth flange for a perfect connection and perforated flange for better adhesion to bituminous sheaths. With a pyramid shape, the CM10 and CM90 cover diameters from 10 to 80 mm and 90 to 200 mm, respectively. Made of TPO, they are weather-resistant and offer flexibility even at low temperatures, ensuring durability and a long-term stable performance.