The seat of moulded polyurethane foam provide a good sitting comfort and is practical and robust-also in the harsher environments. Polyurethane is distinguished also by being tough against many types of fluids and chemicals, and is easy to clean. This stool is with 400 mm. steel base with tool tray and with 75 mm. smooth-running wheels, two of which are with brake. Standard seat height: 37-50 cm. Alternate seat heights: 54-80, 46-65, 31-38 cm.