In 2010, SEBO replaced the C series vacuum with the D1, D2, D3 and D4 series - the largest cylinder vacuum SEBO has ever produced for the domestic market and specifically designed for large homes. Designed in collaboration with Achim Heine, Professor of product design and member of the German Design Council, whose timeless design is famous with Braun's small appliances, this innovative new vacuum emanates form and function, led by SEBO's original design knowledge. For example, the circular front, with its patented airbelt bumper, is ideal for negotiating obstacles, houses an easy to remove filter inside, and allows a large capacity 6 litre disposable high filtration dust bag. An extra long 12m cable contributes to an incredible 15.5m cleaning range, twice the cord length that other German brands supply.