GOOD QUALITY- The chair base is made for Heavy Duty Plastic, wear-resistant, and rust-proof. 28" in diameter ideal for executive Tilt/Swivel style chairs. 360-degree swivel action for easy transfer
HEAVY DUTY BOTTOM PLATE- Standard gas cylinder. The seat plate has a fixed mounting hole, mounting
hole distance: 10.2 " x 6". Twist hand wheel to tighten or loosen (adjust) backward tilt tension
STANDARD GAS CYLINDER- It has a 5" travel from lowest to highest. The adjustable height of the cylinder 4
UNIVERSAL CASTERS- The diameter of 5 casters is 60 mm. The friction is small with noiseless function
EASY INSTALLATION- It is extremely simple and convenient to install and operate. Only four steps are required as the picture