The unbranded mid-back white frame mesh ergonomic office task chair, model OF-MB-WF-505, presents a clean minimalist modern visual defined by its crisp white structural frame paired with consistent dark grey seating and backrest elements. Its compact, balanced proportions align with standard desk layouts, featuring fixed T-shaped armrests that sit flush with the frame silhouette for a streamlined, uncluttered appearance suited to both professional and residential environments. Construction pairs durable, purpose-built materials for long-term regular use: a molded white nylon frame forms the back and arm support structure, while a glass-fiber reinforced white molded nylon five-star base delivers stable weight distribution. The backrest is upholstered in dark grey 100% polyester breathable mesh, shaped to provide fixed contoured mid-back lumbar support without separate adjustable components. The seat uses a molded high-density polyurethane foam core with a 45 kg/m³ density, wrapped in dark grey wear-resistant polyester fabric. Mobility is supported by black polyurethane swivel casters, with a Class 3 rated black powder-coated steel gas lift and 2.5mm thick stamped steel tilt chassis forming the core movement hardware; armrest pads are integral matte-finish molded polypropylene. Core functional features support comfortable extended use: pneumatic seat height adjustment with an 85mm stroke is controlled via a right-side under-seat lever, enabling a maximum seat height of 525mm from the floor to pair with standard 760mm height office desks. The chair supports full 360-degree swivel rotation, with a lockable tilt mechanism that allows backrest recline up to 125 degrees, paired with an under-seat tension knob to adjust recline resistance to match user weight, plus a lock for the fully upright position. The five dual-wheel PU casters enable smooth movement across hard floors and low-pile carpet, with fixed T-armrests positioned 200mm above the seat to provide stable forearm support. The mesh backrest holds a 30000 Martindale cycle abrasion resistance rating, casters are rated for 100000 rolling cycles, and the chair supports a maximum static load of 136kg, with compatibility for users up to 183cm tall. This chair fits a range of use cases: its compact footprint makes it ideal for 8-hour daily use at open-plan office workstations, while its neutral two-tone finish complements modern residential decor for home office study spaces. The mobile swivel design supports easy repositioning in meeting and collaboration zones, and its durable construction suits multi-user rotating use in co-working shared spaces. It pairs well with standard workstations as well as 2.4m executive desks. For procurement planning, note each chair is shipped across two cartons with a total packaged gross weight of 23kg and total carton volume of 0.26 cubic meters per set, with an assembly time of 40 minutes per unit. A 20-foot GP container can hold 135 sets at 85% space utilization, ideal for bulk outfitting projects.