STL series adjustable student chair height group 3-5

The bottom part of the frame is made of round 32*1,2mm diameter. The middle part of the frame is made of round electrically welded pipe with diameter 28mm and 32mm, wall thickness 1,2mm. The upper part of the chair frame is made of flat-oval pipe 30*15mm, wall thickness 1.5mm. The horizontal lintel is made of round thin-walled electric-welded pipe 18 mm in diameter, wall thickness 1.5 mm. The support part of the leg, made of round thin-walled electric-welded pipe, has an arc-shaped shape with a bending radius of 1000 mm. The chair is equipped with external supports. The support is plastic, made of polyethylene. The support is designed to fit on a pipe with an outer diameter of 32mm, the outer walls of the support are 1.2mm thick. The support is put on the pipe to a depth of 32mm, for fixing the pipe inside the plug, stops are made. In the front part of the support is rounded and passes into the sole of the support, which has dimensions 56*36mm and curved shape with a radius of 50mm. In the lower part of the support, on the sides of made cutouts triangular shape..