b'Optional FeaturesThe following are optional extras to the range.Lumbar SupportPolished Base Seat Tilt Seat SlideInflatable add 60 add 27 add 32 Lumbar add 30SynchroInflatable Ratchet BackFolding & Height TH234 TH230 MechanismSeat Pad AdjustmentAdjustable Arms with add 42 add 32 add 50MULTIFUNCTIONAL ARMS WITHOUT ARMS Ratchet Back Adjustmentadd 6937 www.airseating.co.uk'