Abstract: A height adjustable leg 10 for an office desk. The leg 10 includes an upper plate 11 to be attached to a workbench top, and a base to rest on a floor surface. The plate 11 and base 12 are coupled by means of a telescopic assembly including an outer tubular member 14 that telescopically receives an inner tubular member 15. Providing for sliding telescopic movement of the member 15 within the member 14 is a first bearing 23 fixed to the upper extremity 24 of the member 14, and a second bearing 25 fixed to the lower extremity of the member 15.