My Stool, Bar-Stools with gas seat height adjustment, available with 2 different bases. Stool with 4-leg frame is stackable up to 5 pcs. Seat of beech plywood , 11 mm thick. Column and footrest are of chromed steel. 380x380 mm square or diameter 400 mm round bases with stainless steel cover. 4-leg frame is of chromed steel diameter 16 mm and 2 mm thick.