The Sphere chair is made of a steel pipe with a diameter of 30 mm. Chair frame can be powder coated in 9 standard colours. The seat of the chair can be upholstered in any fabric of your choice. The bases of the Sphere chairs are equipped with plastic thrust pads.
Country of origin: Russia

https://www.bentwood.ru/catalog/stulya_main/metallokarkas-s/stul_sfera_b_myagkiy/ 

https://www.bentwood.ru/