Unique curved backrest and extra large steel seat for extra comfort.Overall H x W x D: 754 x 465 x 518mm.Seat height: 463mm.Chairs supplied in packs of 4.Tested to BS EN 16139:2013 EN581 - level 1 & 2.PIRA medium hazard crib 5 upholstery.Optional chair locks available, code 325826 (2x locks required to join 2x chairs) .