The Black Split-Back Ergonomic Swivel Office Chair (model ERG-SB-01, unbranded) presents a clean, minimalist professional silhouette anchored by a five-star caster base, with a streamlined dual-panel split backrest and contoured lower lumbar support that delivers structured visual balance without unnecessary ornamentation. Its uniform black finish creates a cohesive, understated look that integrates seamlessly across a range of environments without drawing undue visual focus. Constructed for durable daily use, the chair features black breathable woven fabric upholstery over high-resilience and molded high-density polyurethane foam padding for both the seat and back components. Its internal support structure relies on a steel tube frame, 30% glass-fiber reinforced nylon five-star base, Class 4 steel gas lift cylinder, and steel plate multi-lock tilt mechanism. Armrests combine soft polyurethane padding with rigid polypropylene supports, while dual-wheel polyurethane casters enable smooth movement across floor surfaces. Functional design prioritizes adjustable, user-centric support for extended seated sessions. The chair enables full 360-degree swivel rotation, pneumatic seat height adjustment, 125-degree maximum backrest recline with four lockable positions, user-customizable tilt tension, and height-adjustable armrests that align with standard desk surfaces. The independent split upper back panels flex to follow natural spinal movement, paired with a fixed contoured lumbar pad that supports the natural lower back curve across working positions. This chair is suited for a wide range of commercial and residential spaces, including open office workstations for daily 8-hour seated work, home office setups where its neutral finish avoids visual clutter, meeting and conference rooms where swivel and mobility support collaborative discussion, shared coworking spaces where flexible adjustments accommodate diverse user needs, customer-facing administrative and reception areas, and task-focused work zones for extended computer-based work. For procurement planning, note that each unit ships across two cartons, with an assembly time of 40 minutes per set. The chair supports a maximum user weight of 150 kg, with height adjustment travel that pairs effectively with standard 760 mm height desks, and durable component ratings suited to high-traffic shared work environments.