All about About A Stool AAS32 by Hay on Architonic. About a Stool is perfect as, well, a bar stool but also for informal meetings or meals. It has the same capacity for transformation as the other members of the family and ranges from a minimalist and simple plastic stool to a sensuous upholstered version with a weightier presence. Hay’s Copenhague Barstool is the result of a collaboration between Erwan and Ronan Bouroullec and Hay for the University of Copenhagen. Available now to buy online. REVOLVER STOOL. LEON RANSMEIER. INFOZOOM. A formal looking barstool made in square steel tube that is mounted onto a bearing mechanism to allow the seat and foot ring to turn 360 degrees.