Pupil's chair Etalon adjustable 5-7 group, Omega brand

Stools series "Etalon" are made in accordance with the requirements of GOST 22046, GOST 11016.
They are recommended for equipping classrooms as for senior classes, with the growth of students from 165 cm. to 190 cm. and above, and for junior classes from 135 cm. to 165 cm.
The product is based on a sturdy frame made of round steel pipes of 32*1,5; 28*1,5 and 22*1,5 cross-section.
The rigidity of the frame is ensured by two horizontal crosspieces made of 22x1.5 round section pipes located under the seat and between the supports.
The frame is painted with polyester powder paint.
Seat height adjustment is telescopic, with a step of 40 mm.
The backrest and seat are made of 8 mm thick birch plywood.
The seat has a squeeze and curve front edge. The backrest is radiused with a lumbar bend in the lower part. Fastened to the frame with extractor rivets.