The ERG-SB-01 Black Split-Back Ergonomic Office Chair delivers a balanced combination of structured support, professional aesthetic, and functional versatility for commercial and residential work environments. Its visual design features a sleek matte black finish across all components, with a distinct split independent dual-panel upper back paired with a contoured integrated lower back pad that creates a streamlined, ergonomic silhouette. The chair sits on a wide five-star caster base, with fixed PU-padded armrests positioned at a consistent height, and a compact adjustable headrest mounted to the top of the backrest, creating a cohesive look suited to formal and casual workspaces alike. Overall dimensions measure 690 x 690 x 1180 mm, with a 700 mm backrest height, 520 mm wide and deep seat, and 320 x 180 mm headrest, creating a proportional footprint that avoids excess bulk. Construction prioritizes durable, long-wearing materials: woven black polyester fabric upholsters the seat and backrest, layered over high-density polyurethane foam with 80 mm thickness on the seat and 50 mm on the back, with a 60% rebound rate to maintain cushion shape over extended use. The structural core uses a curved black polypropylene back frame, 2mm thick steel internal seat reinforcing plate, chrome-plated steel Class 3 gas lift, glass-filled nylon five-star base with 3mm wall thickness, and black nylon dual-wheel casters. Fixed armrests feature polypropylene structures topped with soft PU padding for consistent forearm support. Functional features are tailored to extended seated use: pneumatic seat height adjustment offers a 100mm stroke controlled via a side lever, paired with a center-tilt mechanism with adjustable tension and a single-position tilt lock to secure an upright working posture. The 2D adjustable headrest moves vertically and tilts to accommodate neck support preferences, while the split back design moves independently to align with upper back contours, and integrated lumbar support maintains consistent lower back alignment. Five dual-wheel casters enable smooth swivel and rolling mobility, supporting easy repositioning during tasks or collaborative discussion. The chair is rated for a maximum user weight of 181 kg, with a base static load rating of 1136 kg and casters tested to 100000 rolling cycles, and is recommended for users up to 1900 mm tall. It performs reliably on hardwood, tile, and low-pile carpet floors, making it suitable for open office workstations for daily 8-hour task work, compact home office setups for remote work, private manager offices for executive and administrative roles, and conference rooms where swivel and mobility support multi-directional communication during meetings. Procurement teams should note that each chair ships in two cartons with a total packaged gross weight of 23 kg and 0.26 m³ total volume, with a reference assembly time of 40 minutes per unit. Container loading capacity reaches 135 sets per 20GP container at 85% space utilization, supporting efficient bulk ordering for large-scale workspace furnishing projects.