The ella features a synchro mechanism seat slide and lumbar support for maximum comfortplease note image is for illustration purposes only this office chair comes with a chrome base fabric seat chrome base 1d adjustable arms height adjustable 2d adjustable arms height adjustable pad adjustment synchro adjustment seat slide 8 hours use back adjustment back height adjustment seat height adjustment 110kg load capacity 5 year guaranteemeasurements width 710mm depth 710mm