Ergonomic Office Desk Chair: The mesh back of this seat is designed to conform to the curve of a person's lower back. We have also added an adjustable lumbar support to suit different people's needs Functional Computer Office Chair: The office task chair features 360° swivel, 4-inch height adjustment and adjustable lumbar support. The durable nylon base, breathable mesh back and flexible casters make this chair perfect for everyday office use. Overall Height: 34.2-38.2 (87-97 cm). Height from seat to floor: 15.7-19.7 (40-50 cm) Comfortable Material: Our office chairs are made of high quality materials including high density mesh, thick and wide foam cushions, high quality pneumatic lift cylinders, sturdy nylon bases and 360° swivel casters Portable Office Chair:Featuring an armless design, this chair also comes with 360-degree swivelling and flexible rollers for easy storage and mobility Easy To Install: We provide accessories and installation videos to make your ins