Stiff metal-framed student chairs type II, adjustable numbers 3-5, 5-7

The frame of the chair is made of metal pipe 20*20*1, 5 mm, the support is made in the form of two legs and a crosspiece made of profile pipe 40*20*1, 5 mm. The frame and support are connected by a gas lift, which performs the function of height adjustment of the chair within five height groups. The gas lift has a force of 280 N, it is placed in a telescopic geometric form made of 40*40 and 50*50 mm profile steel pipes with a wall thickness of 2, 0 mm between which there is a plastic compensating insert, thus preventing rotation of the chair base. The backrest and seat are made of vandal-proof double-sided breathable high-density polyethylene (HDPE).