Featuring a five-legged castor base, the AAC 155 combines the high functionality of a task chair with optimal comfort and modern aesthetics. Retaining the same high backrest and generous seat that characterises the series, the base is designed with a tilting mechanism and a gas lift that can adjust the seat height.

The base is available in either polished or powder-coated aluminium, and the shell comes in a variety of upholstery options, providing a multitude of design combinations that give this series versatility in a wide range of corporate, public, and private contexts.