Specifications: Quantity: 2; Colour: black; Materials: Steel, Iron, PP, Polyester Mesh, Foam, Nonwoven Fabric, Composite Boards; Overall Dimension: 60 cm L × 60 cm W × 91-100.5 cm H; Maximum load capacity: 136 kg Breathable Mid-back Design: Featuring densely knitted mesh backrest, this mesh office chair allows better airflow, accelerating heat and moisture dissipation. Mid-back design supports your spine's natural curve and protects your lower and middle back as it prompts you to sit straight Comfortable Armrests: The ergonomic armrests provide you with all-time support to your arms and enable you to sit more comfortably, getting rid of your fatigue after a long day’s hard work Adjustable Seat Height: The seat height of this pair of computer mesh chairs can be simply adjusted from 35cm to 45cm by a little push-up/press down at the lever under the seat according to your needs Star Base & 360 Degrees Wheels: Twisting and turning about is integral within the office. So this ergonomic chair adopts a stable star base and comes with 5pcs 360-degree swivel wheels, ensuring fluent and quick movement and keeping up your quick pace of work