Joy-H, Boss ergonomic modern revolving mesh modern office desk chair with adjustable headrest in height

1) High back ergonomic mesh office chair with adjustable headrest in height; 2) Mesh back + height adjustable padded lumbar support (+7CM) & white PP back frame;3) Fabric padded seat with high density foam inside;4) Height adjustable armrest with soft PU armpad;5) BIFMA passed CLASS 3 chrome gaslift;6) Muti-functional mechanism with back reclining and locking at 3 positions function ,with seat sliding (+4.5CM);7) 350MM aluminum five star base & BIFMA passed 60MM PU nylon castors;8) Quality warranty: 3 years.