【360° Mobility】Our study chair is equipped with a wide star nylon base with 5 wheels. Silent castors do not produce noises while moving, they also do not cause any scratches and damage to the floor with a smooth finish. This office chair can swivel 360° effortlessly from task to task. 【Adjustable Seat Height】Seat height of our ergonomic computer chair can be adjusted for 43-56cm/17-22’’. It has the flexibility to customize our customers’ preferred sitting position according to their needs. Simply pull the lever beneath the seat while sitting if you want to lower the seat. 【Clear Instructions】All the necessary hardware and handy tools are prepared in the package including an instruction manual. Two adults are required for the assembling procedure, and a few steps are involved to set this up.