The Mid-Back Black Upholstered Ergonomic Office Task Chair (model OC-MB-001) is an unbranded entry-level task seating solution designed for versatile dly use across commercial and residential settings. Its visual profile features a sleek, uniform black aesthetic with smooth matte polyurethane faux leather upholstery on both the seat and contoured mid-back backrest, paired with a matte black reinforced nylon five-star base and fixed T-shaped hard nylon armrests for a cohesive, professional appearance. The chair’s compact mid-back form balances support and space efficiency, with flat horizontal arm pads that complement its streamlined silhouette. Constructed for durability, the chair integrates a plywood-reinforced steel internal frame with welded support brackets, a chrome-plated Class 3 gas lift cylinder, and a black powder-coated steel tilt mechanism chassis. The seat uses high-density molded polyurethane foam for cushioning, while the backrest employs medium-density contoured foam to deliver targeted lumbar support. Its five-star nylon base includes a ribbed underside structure for enhanced stability, and dual-wheel black nylon casters with steel axles provide smooth mobility. All adjustment controls are positioned under the seat for intuitive access. Functionally, the chair supports a range of posture adjustments to suit individual user needs. Pneumatic seat height adjustment is operated via a right-side lever, delivering 100 mm of vertical travel to align with standard desk heights. A sync-style backrest tilt mechanism offers up to 12 degrees of recline from the upright position, with a position lock and a rotary tension knob that adjusts recline resistance to match user weight. Fixed T-armrests provide stable forearm support, while full 360-degree swivel capability enables easy movement and collaboration. The five-point base distributes weight evenly to support a maximum user weight of 120 kg, and the dual-wheel casters roll effectively on both low-pile carpet and hard flooring surfaces. This chair is suited for a broad spectrum of spaces. In commercial settings, it works well at general office workstations for 8-hour dly use, in conference and meeting rooms for attendee seating, at administrative and reception desks, and in co-working and flexible hot-desk environments where rotating users require adjustable, easy-to-clean seating. For residential use, it fits seamlessly into home office setups, with its compact footprint and multi-surface mobility adapting well to dedicated workspaces with mixed flooring. For procurement planning, each unit ships as a flat-pack knockdown configuration in a single carton, with a gross weight of 21 kg and a volume of 0.171 CBM. Assembly takes 30 minutes for one person using standard tools, and a 20ft contner holds 240 units with standard pallet stacking efficiency. The chair carries a 2-year commercial warranty covering structural and upholstery defects, making it a cost-effective choice for bulk seating deployments across diverse work environments.