STL series adjustable student chair height group 2-4

The lower part of the frame is made of round electrically welded pipe with a diameter of 32 mm, with a wall thickness of 1.2 mm. The regulating mechanism is made of electric-welded pipes of 28 mm and 32 mm diameter, with wall thickness of 1,2 mm. The support part of the lower part of the frame has an arc-shaped form with an internal bending radius of 1000 mm. The lintel is made of electrically welded pipe with a diameter of 18 mm and a wall thickness of 1.5 mm. The upper part of the frame is made of electro-welded flat-oval pipe 30*15 mm, 1.5 mm thick, the pipe is equipped with plugs at the ends. The open ends of round pipes on the frame supports are covered with overlapping polypropylene protectors.