product design rendering of a modern ergonomic mesh office chair white background studio lighting chair upper body keep exactly gray horizontal stripe breathable mesh backrest mid high back dark charcoal gray fabric seat cushion slightly curved black plastic armrests t shaped height adjustable black nylon frame and back shell chair base mechanism replace with heavy duty black stamped steel seat adjustment chassis plate mounted directly under the seat cushion the chassis is a rectangular black powder coated steel plate with multiple mounting holes and slots two horizontal steel tube handles extending symmetrically from both left and right sides of the chassis each handle has a black rubber cylindrical grip at the end metal l bracket lever connectors attaching handles to chassis the entire mechanical base assembly is matte black industrial steel scale chassis width approximately equal to seat width 50 55cm the mechanism sits low profile directly beneath the seat replacing the gas lift cylinder and star base completely bottom of chassis has folded metal bracket legs touching the floor view 3 4 front angle same perspective as reference chair image style photorealistic product photography 8k white background soft studio lighting sharp details commercial product shot
