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