b'optional featuresThe following are optional extras to the range.Lumbar SupportPolished Base Seat SlideInflatableInflatableadd 60 (60mm)Lumbar Seat Padadd 32 add 37 add 42XL Seat Pad Coccyx Seat580W x 520DCut Out KA334 KA330 add 75 add 30HIGH BACK HIGH BACK WITH MULTIFUNCTIONAL ARMS WITHOUT ARMS Inflatable FoldingX-4D Arm Pad Memory Foam Thorax Support & Heightadd 25 Seat add 37 Adjustableadd 55Arms41 www.airseating.co.uk add 50'