Greiner work stool comes with foot release for impressive functionality when working with dirty gloves or in a sterile environment. The disc is located at the top of the base and it can be actuated from any side on the work stool. The stool can be adjusted between 54 to 73 cm. Safety castors are standard on all work stools, which keeps the chair in position when it is unoccupied. The diameter of the seat ic 40 cm. The base is high polished aluminum and the column is chrome plated. All models ship standard with the foot ring offering user additional comfort and better body positioning. All models have optional electroconductive. The ergonomic conical seat design is optional and can be ordered