The Buro Roma 3 lever chair's exceptionally comfortable seat and supportive back more than match its modern good looks. Its many seat and back position adjustments enable the user the ultimate office seating experience Buro Roma Chair is supported by the following internationally recognised standards: AFRDI Level 6 130 x 48mm gas lift Ratchet height adjustable back/lumbar Independently adjustable seat angle - free floating or lockable Independently adjustable backrest angle - free floating or lockable Polyurethane moulded foam D1 nylon base 60mm twin wheel castors Height and width adjustable arms.