The model EOCH-M660-GR unbranded high-back ergonomic mesh office chair delivers structured, professional support across daily work settings, with a clean, streamlined grey finish that fits both private and shared work environments. Its visual profile features a tall mesh back paired with a contoured fabric seat, mounted to a classic five-star caster base that maintains a balanced, unobtrusive footprint suited to standard desk layouts. Maximum overall dimensions measure 660 x 680 x 1245 mm, with a 515 mm wide backrest, 505 mm wide and 430 mm deep seat, creating a generously proportioned seating surface without excessive visual bulk. Construction prioritizes breathable, durable material selection for long-term regular use. The backrest uses breathable woven polyester mesh stretched over a reinforced polypropylene (nylon) frame, with an integrated contoured fixed ergonomic lumbar zone for consistent mid-back support. The seat is padded with 60 mm thick high-density polyurethane foam rated at 45 kg/m³ density with 55% rebound rate, upholstered in woven polyester fabric. Core structural components include a 2.5 mm thick explosion-proof steel seat chassis, steel pneumatic gas lift cylinder, reinforced nylon five-star base, and 60 mm diameter polyurethane swivel casters. Armrests feature soft polyurethane padding supported by reinforced nylon structures. The chair is engineered for tailored comfort across extended work sessions. A pneumatic under-seat lever controls 100 mm of seat height travel, accommodating use with 1200 mm height standing desks. The headrest offers 65 mm of vertical height adjustment, while armrests adjust 85 mm vertically for customized upper body support. The backrest supports multi-position locking up to a 130° recline with adjustable tension, alongside 360° full rotation around the central axis. The PU casters roll smoothly without scuffing on hard floors and low-pile carpet. The chair supports a maximum static load of 150 kg, and is sized to accommodate users up to 190 cm tall, with a maximum seat height of 555 mm and maximum armrest top height of 730 mm. This model is suitable for 8 hours of daily use in private home offices for remote workers and students, for shared open-plan corporate workstations where commercial-grade durability is required, and for small business reception and meeting spaces where its neutral professional finish complements client-facing settings. For procurement planning, each chair ships in 2 cartons with a total packaged gross weight of 23 kg and 0.26 m³ total volume, requires 40 minutes of assembly per unit, and fits 135 sets per 20GP container at 85% space utilization.