1.COVER:High quality PU leather office chairs,comfortable and durable 2.FOAM: High density sponge,durable ... shape, soft seat 1.COVER:High quality PU leather office chairs,comfortable and durable2.FOAM: High density sponge,durable shape, ... chrome,agile lift and no-malfunction6. Tilt tension adjustable and lockable,seat height adjustable7. SIZE:standard.mechanics design,fine workmanship office chairs