Excellent build quality with good balance of metal and nylon construction. Generous seat and backrest dimensions that even tall users will find comfortable, superb lumbar support that moves up/down to cradle your lower back, the large contoured back and headrest that naturally fits the shape of most people. Comfort seat with 6.5cm thick cushion that"™s easy to clean. Premium castor wheels that glide over all types of surfaces easilyUPGRADED VERSION & Tilt-Lock Function; Adopts an upgraded strong metal 5-star base to avoid any damage. Equipped with a new lumbar support with high density memory foam, more comfortable and eliminate any pain. Comes with a tilt locking mechanism that goes from 90 degrees to 150 degrees that allows you to find a comfortable position you desired.ã€�Numerous Adjustable Features】 Equipped with the premium adjustable system which consists of several parts, it includes adjustable headrest height, lumbar support and armrest height, backrest tilt angle, seat cushion height, and tilt tension.ã€� Easy to Install】 â—†Provide the detailed instruction to help you quickly and hassle-free to install the office chair