Easy to install (Assembly required). Heavy duty hydraulic pump make height adjustment easier. Double-reinforced saddle sticking prevents ripping and tearing. High-density foam makes your clients to be more comfortable. 360 degree swivel, can be locked at any position. Plating disc, Pump, PU arm. Chair back can be easily adjusted to multiple locking positions with a gas-piston release mechanism. Material: PVC leather; High Density Sponge. Cushion size: 18" x 19.60". Pump lifting height : 6.70. High density sponge provides extra comfort for your client. Heavy duty ...