Standard Cylinder DiameterOuter cylinder: 2 inches, Inner
cylinder: 1.1 inches. Please confirm the measurement before ordering.. High QualityMade of the highest quality 45# steel materials to hold great weights and provide durability. tall center support column.. Flexible rotationFull 360 degree rotation, smooth and noiseless movements to all directions..
Adjust Chair HeightMinimum length: 8.5 inches. maximum length when fully extended: 12.5 inches.
adjustable range: 5 inches.