Office chair Topstar Chairman NC79R A80 black ergonomic design with adjustable height and swivel base

Topstar Chairman NC79R A80 black ergonomic design with adjustable height and swivel base is a compact office chair intended for daily desk work. The chair combines a contoured seat and back with a gas-lift mechanism to allow precise height adjustment and a 360° swivel base that enables easy orientation around the workstation. Equipped with smooth-rolling casters, this model is designed to support neutral posture and reduce strain during prolonged sitting while remaining suitable for limited spaces in home offices and shared workplaces.

Advantages

The ergonomic shape of the seat and back promotes spinal alignment and reduces pressure points. The height-adjustable gas lift adapts the chair to different desk heights and user statures, while the swivel base and casters provide mobility and ease of movement across typical office floors. The compact footprint and neutral black finish make the chair space-efficient and visually unobtrusive in most interior schemes.

Suitable for

• Home office and remote workstations
• Standard office desks and meeting rooms
• Short to medium-duration desk tasks such as paperwork, computer work, and video calls
• Shared workspaces where mobility and easy repositioning are required

Key specifications

• Seat type: contoured padded seat for everyday use
• Adjustment: pneumatic height adjustment (gas lift)
• Base: five-star swivel base with 360° rotation
• Mobility: smooth-rolling caster wheels suitable for hard and low-pile carpeted floors
• Upholstery color: black
• Intended use: office and home workspace seating

How to use

Adjust the chair height using the lever under the seat so that your feet rest flat on the floor and your knees form approximately a 90° angle. Sit so that your lower back is supported by the chair’s backrest; if needed, position the seat depth to allow a small gap between the front edge of the seat and the back of your knees. Use the 360° swivel to reach items around your desk without twisting your torso, and roll the chair on its casters to reposition as required. Perform regular short breaks from sitting to relieve spinal loading.

Usage recommendations

For longer daily use, pair the chair with an adjustable desk and position monitor height to keep the top of the screen at or slightly below eye level. Periodically check caster and gas-lift operation and keep floor surfaces clean to preserve mobility and protect flooring.