High density foamAdjustable height leverSilent easy roll castersMedium piston is available to use with manicure19"W x 23"DSelect: Low Piston Option- 7.5β - 9.5β (14.5β from base to top of chair at highest point)OR Select: Medium Piston Option- 9.5β - 13.5β (18.5β from base to top of chair at highest point)