c. 1950's american vintage industrial "adjusrite" lightweight stationary stool salvaged from a chicago factory. the portable stool measures 18 inches in height. the hydraulic locking mechanism remains in working condition. weighted four-legged x-shaped cast iron base provides added stability. manufactured by the adjusto equipment co., bowling green, oh. original black paint finish on the swivel seat lightly cleaned. the base and central supporting member contain a brushed steel finish.