original c. 1950's american vintage industrial "adjusrite" lightweight stationary stool salvaged from a chicago factory. the portable models are instantly adjustable from a minimum of 18 inches to as much as 28 inches from the floor. the hydraulic locking mechanisms 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 brushed clean.