Featuresr thick sponge padded and ergonomic back for long time comfortable seatingr 10cm height adjustable with safe pneumatic gas liftr heavy duty max120kg load bearingr both seat and gliding casters can 360swivel or move smoothly on floorr convenient to tilt the chair backward for relaxing with tilt lock mechanismr solid construction easy assembling durable to sitr perfect for home and office use for work study relaxing etcr r how to use the tilt lock functionr this office chair