Versatile Office Chair: Our chair features 360° swivel, 4 inch height adjustment, adjustable lumbar support. Its durable nylon base and flexible casters make this chair ideal for daily office use. Overall height: 34.2"-38.2" (87-97cm). Height from seat to the floor: 15.7" - 19.7" (40-50cm) Adjustable Lumbar SupportThe adjustable lumbar support of this ergonomic office chair has a sliding range of 2 inches, which can provide good back support according to the needs of users Premium Quality Materials: Our office chairs are made of quality materials, including American-made high density mesh, high resilience foam cushion, high quality gas lift cylinder, a sturdy nylon base and 360° swivel casters. WEIGHT CAPACITY: 250 lbs. Space-saving Computer Desk Chair: Armless design allows you to easily maneuver the chair under your table, freeing up valuable space when not in use Effortless Assembly: We provide a installation instructions in the item box and a video gu