1. High quality looks design,armrest with PU pad direction and height is adjustable, 2. Lumbar support height is adjustable. 3.The seat height adjustment,with mould foam, easy to replace and clean freely. 4. Locking lever offers 3 tilt lockingposition with a "return prevention setting” 5. 350MMNYLONBASE with hubcap style castors,4 GRADEgas lift with LANT brand. roll smoothly and stably.