Ergonomic air-lift stool @equipro_bty • Cushion-shaped to help improve blood circulation at thigh level • Adjustable and ergonomic backrest • Stool with adjustable height • Stain resistant black base with 5 legs • Silent casters • 2 year warranty • Ultra-white and ultra-resistant vinyl • Partial assembly required • Minimum height: 20 1/2" • Maximum height: 27 1/2" #equipment #spa #stool