BLACK MOBILE STABLE STOOL MADE OF PLASTIC AND WITH 3 WHEELS AT THE BOTTOM THAT ALLOW IT TO BE MOVED AND ATTACHED TO THE FLOOR. STRONG COMPACT AND LIGHTWEIGHT IT SUPPORTS UP TO 150kg OF MAXIMUM WEIGHT. MAXIMUM HEIGHT 42cm UPPER DIAMETER 28.5cm BASE DIAMETER 43.5cm IT HAS A PERIMETER RUBBER ON ITS BASE THAT PREVENTS SLIDING AND HITS AGAINST FURNITURE.