1.There will be acoustic perforated holes on the seat wooden cover 11.In the seat and backrest sponges of the seats, 50 +- 5% density cast polyurethane sponge will be used, with the thickness of the thinnest part (both in the seat and the recliner) not falling below 8 cm. The sponges will have a fireproof feature in accordance with the MVSS 302 European standard.The upholstery fabrics will be laminated in accordance with the flame method technique of 4 mm thickness and a primer will be applied on them 10.A polished wooden cover made of dehumidified beech material will be mounted on the backs of the seat and backrest sponges of the seats.The seats will be ergonomic in shape and appearance, the backrest unit, armrests, seat and foot will be mounted firmly to the seat frame, there will be no shaking or gaps in the connection system.A polished wooden armrest made of beech material will be mounted on the armrest frame.The seats will be single-legged, molded from sheet metal with a thickness of at least 2.5 mm, able to fully touch the ground, and will be able to be fixed to the ground with at least 3 fastening elements on each leg.The backrest frames of the seats will be manufactured from profile material with a thickness of at least 15x15x1.5 mm. 4.2.3.5.6.8.9.12.15.16.17.