Item Number Color Product Size (inch) Product Size (mm) Package Size (inch) Package Size (mm) Net Weight (lb) Net Weight (g) Gross Weight (lb) Gross Weight (g) ZHUMI-AM-JBJ15BL-2D1BK-SLD Black 9.69 × 8.07 × 15.91 246.13 × 205.00 × 404.11 15.66 × 8.03 × 13.18 397.76 × 203.96 × 334.77 8.07 3660.49 9.81 4450.74 ZHUMI-AM-JBJ15BL-2D1GY-SLD Grey 9.69 × 8.07 × 15.91 246.13 × 205.00 × 404.11 15.66 × 8.03 × 13.18 397.76 × 203.96 × 334.77 8.07 3660.49 9.81 4450.74 Ergonomic full coverage, no fatigue even after long sitting Wide seat + soft elastic cushion, with a sofa-like embrace; double-layer backrest cushioning + support in balance, reducing muscle soreness during long office work or gaming. Flexible multi-directional adjustment for comfort and personalization 5.7-inch adjustable armrests, backrest adjustable from 90° to 135° backward; 360° rotation + silent caster wheels + telescopic footrest, allowing for a more relaxed and comfortable full-body experience. Suitable for various scenarios, versatile use Scratch-resistant and wear-resistant, suitable for home office, study, living room, and game room; simple and versatile, suitable for work, relaxation, and short breaks. High-quality structure, stable load-bearing 350 pounds 3-stage air pressure rods + reinforced base + solid frame, strong stability, with a load-bearing capacity of up to 350 pounds, durable and not prone to shaking. 15–30 minutes quick assembly Complete accessories + clear instructions, simple and time-saving installation, quickly use the comfortable chair.