1.ISO9001 2.Virgin grade material 3.Bona fide tube thickness, gas lift and swivel chair base 4.Fast delivery time 5.OEM ODM Size: Material:Available Color:Tube: Hight: 780mmSeat and Back: PPFrame: silver powder coated steel tubeBlack, BlueDiameter: 25mmSeat Width: 580mmThickness: 1.2mmSeat Depth: 550mm Seat Height: 450mm Plastic training room chair and writing desk for school/college and company