About this item

• Heavy duty (450 lbs capacity), Highest End 4
• Big Extension-Minimum Length 13.78 Inches, Maximum Length:22 Inches, Extension: 8.22 Inches
• Universal size, suitable for most drafting stools, task chairs, office stools, computer chairs
• Moves smooth and noiseless go up and down, 360 degree rotation
• A plastic cap to secure the hydraulic on the top, please remove out the plastic cap when assembly.