Product DescriptionIf you wanna choose color, please contact us by email or leave us a massage, or we will send it randomly.Product DescriptionSeating(Upholstery):Material -PU Leather -High Density Rebound Foam-Superior injection plastic boardSize 450mm×300mmFeature To protect the spine, cervical vertebra and lumbar is the biggest advantage of "Saddle Seat" . Improving circulation to the lower extremities and increasing blood and oxygen supply to the brain. To reduce the brain fatigue and eyestrain. Saddle seat provide more healthful sitting postures and prevent back pain for the sedentary people. To keep a good working and learning statusSeat Base:Material-Superior injection plastic-Anti-explosion multi-function switchFeature Seat TiltableHeight Adjustment(Foot Controlled)Gas Lift:MaterialPlated metalTravel Distance 200mmFeature Pneumatic Lifting,Anti-explosion,SGS ApprovalBase / Foot Controlled Ring:Material High Polished Aluminum AlloySize 560mmMax Capacity 750KGSFeature Put the feet on the Five Star Base, to keep correct seating posture.Strong, abrasion resistant and No deformation.Castors:Material Superior quality PASize 50mmFeature Inserted style castor, Safety, Silence, antiskid and abrasion Resistance.