The GUOYOU Mid-Back Upholstered Swivel Office Task Chair with Fixed Arms, model OC-MB-BK-001, presents a sleek, minimalist silhouette defined by its classic black upholstery and streamlined mid-back structure. Fixed T-shaped armrests align ergonomically with elbow height, complemented by a ribbed black five-point base and twin-wheel casters that create a cohesive, understated aesthetic suited to professional and personal spaces alike. Constructed with synthetic leather upholstery over a fabric substrate, the chair features molded high-density polyurethane foam in the seat core and medium-density foam in the backrest for structured support. Key structural components include a stamped steel seat pan, a plywood or plastic inner back frame, and a black nylon reinforced plastic five-star base with a steel bearing-equipped central hub for smooth rotation. The height adjustment system uses a black pnted steel gas lift column, paired with a steel tilt and height control mechanism under the seat. Fixed armrests are made of matte hard plastic, secured to the seat pan via reinforced PP plastic brackets, while black nylon twin-wheel casters with metal axles enable multidirectional movement. Functional features include pneumatic seat height adjustment with 100 mm of vertical travel via a left-side lever, 360-degree continuous swivel rotation, and limited backward seat tilt with tension adjustment and selectable locked or free-floating modes. Fixed armrests provide steady upper-body support, and the wide five-point base delivers reliable stability during seated movement. The chair supports a maximum static load of 120 kg, with weight evenly distributed across the five base legs and casters. This task chair fits a broad range of settings, including general office workstations, meeting and conference rooms, administrative staff areas, temporary hot-desking environments, corporate training rooms, and office reception and visitor zones. Its compact footprint also makes it appropriate for home offices and study spaces, where it pairs well with standard-height desks to support dly computer work and paperwork tasks. For procurement planning, the chair ships in flat-pack knockdown form, with one unit per carton. Assembly is straightforward, requiring standard basic tools. Its cost-effective standard configuration supports bulk purchasing for large office deployments, while the durable upholstery and simple adjustment mechanism accommodate high-turnover shared workspace environments.