Here Professional in Each Part of Product | 1) adjustable headrest 1D in height with Nylon,adjustable armrest 1D in height with PU-leather face 2) mesh back frame Nylon,fixed lumbar support Nylon,loadable up to 136kgs,fabric seat with high-end 15mm thickness panel and 50 degree high density foam inside,seat bottom with plastic-shell protection,high-end 3-level black gas lift, 3) Top-grade 3-lockable Butterfly mechanism with 2.5mm thickness,,Dia 340mm black Nylon five-star base,Dia 60mm PU soundless castor |