Pupil's chair part number ??14

Chair frame made of pipe d.51x1,5 mm. The support has the form of a cross of five beams, made of arch pipe section 40h25mmx1,5 mm. Each beam is fitted with a rivet nut M10 for wheel supports. The wheels of the support are 50 mm in diameter. The pivoting radius of the support is less than 50 mm. All wheel supports are equipped with a stopper. Maximum load on each support is up to 40 kg.The upper part of the chair frame is made of 22x1,5 mm pipe. The seat frame is connected to the base by means of a screw-mechanism, the upper part of which is made in the form of a stud M24, welded to a steel plate with a thickness of 3 mm, reinforced with a washer. 3 mm thick, reinforced with a washer and bars; the counter part is a sleeve (M24 thread). Max. lifting height of the screw - 120 mm. One-piece moulded backrest and seat - thickened vandal-proof ergonomically shaped plastic. Seat size. WxHxHxV 440x450x55mm. Gabar. backrest size WxHxH 435x380 mm, thickness. 35 mm. On the backrest there is a special hole for a hand of size 80x5 mm. 80x5 mm. The metal frame is painted with epoxy-polyester powder paint. Colour of plastic and frame by agreement with the customer