Supplied with safety castors featuring an internal brake which disengages when you sit for free-rolling movement & automatically applies when you stand preventing any hazard caused by the chair rolling awayandnbsp;accidentally. Back height adjustment Back angle adjustment Seat height adjustment Seat angle adjustment Free floating back Lumbar support Independent back & seat angle adjustment Tested according to REACH EC No. 19072006 EN 1335-1 -2 -3 UK fire retardant standards level 0 1 & 5 BS EN 7176 & UK SI 1988 No. 1324. Arms included 3 Year warranty Self assembly Delivered next working day; Free 30-Day Trial & FREE Next-Day* delivery