Chair Student "Kitashka", Adjustable, Sitting Plastic DOUBLE BREATHABLE

Student's chair with height adjustment within the growth group No. 2-4, 3-7. Functional dimensions GOST 11016-93. The chair has a steel tube frame. The lower part of the frame is in the form of two supporting elements and racks made of a flat oval pipe 50 * 30 mm in size, with a wall thickness of 1.9 mm.
The racks of the lower part are rigidly connected to each other by a jumper made of flat-oval
pipes measuring 40 * 20 mm, wall thickness 1.5 mm. Lintel length 325 mm.Upper racks made of a flat oval pipe measuring 40 * 20 mm, wall thickness 1.5 mm. The base for the backrest and seat are made of a steel tube with a profile section of 20 * 20 mm, a wall thickness of 1.5 mm. Frame covered
wear-resistant polymer powder paint. The supporting elements have plastic thrust plugs. The mechanism for lifting the chair is carried out by a bolted recessed connection of the uprights, using a bolt and hidden nuts, and is adjusted to the desired height. Between the uprights,
a plastic liner is installed to reduce friction when adjusting the height. The pipe ends of the backrest and seat base are closed with plastic plugs. The back and seat are made of double-sided breathable high-density polyethylene (HDPE). The backrest and seat have internal stiffening ribs in the form of through-holes. The number of stiffeners on the back is 21.
The number of stiffeners on the seat is 20. The plastic back has an ergonomic opening for gripping and moving the chair. Fastening is carried out by means of a hidden screw connection (blind). Plastic seat width 380mm, plastic seat depth 360mm, thickness
plastic seat 40 mm. The width of the plastic back is 385 mm, the height of the plastic back is 220 mm, the thickness of the plastic back is 40 mm. Color as agreed.