Pupil's chair, type II adjustable, height group 3-4-5 Item No. STU 3.5

Adjustable pupil's chair consists of metal frame and bent-glued back and seat.
Material of metal frame: Profile tube 20*20 and 25*25 mm 1,5 mm thick covered with wear-resistant powder paint.
Back and seat material: 9-10 mm bent-glued plywood, varnished (according to TO 5519-001 -31018282825600031l-2015).
The backrest and seat are fixed to the metal frame using
Furniture bolts (GOST 7801-81 zinc).
Adjustment of the chair is carried out by raising or lowering the profile pipe of small size in the profile pipe of larger size, fixing of these pipes between each other is carried out on hexagonal bolts GOST 7805-70.
The presence of internal plastic plugs on the ends of the profile pipe 20*20, as well as the presence of plastic plugs such as "heel", which perform the function of the chair supports.
Dimensions of chairs according to GOSTU, seat height from the floor:
3-5 r.r.(340 - 420 mm)