Furniture ergonomic office chair, height-adjustable desk chair, office chair, executive chair, robust, stable and durable, black Product details: - Material: PU, foam, plastic base - Color: Black - Base diameter: 70 cm - Seat dimensions: 53 x 52 cm (W x D) - Backrest height: 74 cm - Seat height infinitely adjustable: 47 - 56.5 cm - Height of the armrests from the floor: 67 - 77 cm Scope of delivery: - 1 x office chair - 1 x accessory package - 1 x Instruction manual (German, English, French, Italian, Spanish)Furniture NOTES: - Please note that the "Front" label on the seat mechanism must face forward during assembly. Product details: - Material: PU, foam, plastic foot - Color: Black - Foot diameter: 70 cm - Seat dimensions: 53 x 52 cm (W x D) - Backrest height: 74 cm - Seat height infinitely adjustable: 47 - 56.5 cm - Height of the armrests above the floor: 67 - 77 cm Scope of delivery: - 1 x office chair - 1 x accessory pack - 1 x Instruction manual (German, English, French, Italian, Spanish)Furniture NOTES: - Please note that the "Front" label on the seat mechanism must face forward during assembly. -To adjust the seat height, grasp the lever at the rear right underneath the chair and pull it up. Pull the lever outwards to activate the rocker function. Push the lever inwards again to switch the rocker function on or off. -When the rocker function is activated, the seat and backrest move together. The inclination of the backrest can be adjusted; do not change it separately.