The Black and Blue High-Back Ergonomic Gaming Chair combines a racing-inspired silhouette with workstation adjustability. Its tall backrest is finished in black polyurethane faux leather, with blue woven fabric or mesh-like textile on the outer back bolsters and two vertical blue accent strips on the central back panel. Horizontal and side bolsters shape the seat, while a contoured black lumbar cushion and a padded black neck pillow provide targeted support. The overall form is balanced on a nylon five-star base with twin-wheel nylon casters, giving the chair a coordinated black-and-blue appearance suited to performance-focused interiors. Construction centers on a 22 mm steel tubular back frame with welded support joints and a 3 mm steel seat plate connected to the tilt mechanism. The seat uses molded polyurethane foam with a density of 45 kg/m3 and a finished cushion thickness of 90 mm; backrest padding is 70 mm thick with 35 kg/m3 foam density and a 40 percent rebound rating. Black molded polymer arm pads sit on black steel or reinforced polymer support posts. The rated user weight capacity is 150 kg, and the chair is intended for users from 165 to 195 cm tall. Durability ratings cover 100000 caster rolling cycles and 100000 gas-lift height-adjustment cycles. Functional adjustment is controlled through a Class 4 gas lift, activated by a right-side paddle, that sets seat height from 440 to 540 mm. The multi-position tilt lock permits backrest recline from 90 to 160 degrees, while the rocker mechanism allows 12 degrees of rearward tilt with an adjustable tension knob. Four-dimensional armrests move in height and width, slide fore and aft, and rotate to align with the elbows. Both support cushions are removable; the lumbar pillow can be repositioned vertically within its 240 mm support zone, and the head pillow attaches to the backrest for cervical support when reclining. A 360-degree swivel and mobile caster base simplify movement between desk areas. The clear width between armrests is 540 mm, and overall dimensions are 700 by 700 by 1330 mm. These features make the chair suitable for long desktop gaming sessions, home office work, esports or streaming rooms, shared studios, flexible workstations, and computer labs where quick repositioning is useful. For procurement, each set ships in two cartons with a packaged gross weight of 23 kg, a reference carton volume of 0.26 cubic meters, and a reference assembly time of 40 minutes. Buyers should confirm brake casters, fabric grade, foam density, and colorway before bulk purchase. The model is GCH-HB4D-BLKBLU and is supplied unbranded.