he Sitzone CH-520 office chair features a modern design with an aluminum frame, integrating the Italian Donati-DOT mechanism with six-level elastic adjustment for superior support and comfort. The patent-protected back and forth adjustable seat with a 3D adjustable armrest covered in PU ensures personalized seating adjustments. The 60mm extended gas lift with a Class-4 gas lift ensures stability and flexibility in height adjustment. The 350mm aluminum base and 60mm PU casters ensure stability and smooth mobility.