Adjustable Hard Student Chairs with Metal Frame for Classrooms

The frame of the chair is made of metal pipe 20201, 5 mm, the support is made in the form of two legs and a crosspiece made of profile pipe 40201, 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 4040 and 5050 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).