Medina Conference Chair, Supports Up to 300 lb, 17" to 22" Seat Height, Black Seat, Black Back, Black BaseIdeal for conference rooms and meeting spaces, these modern conference chairs with wheels envelop you in support with a breathable mesh back that flexes with your movements. Mesh provides breathable back support. Upholstered seat cushion for comfort. Pneumatic seat height adjustment from 18" to 22". Built in flex mechanism intuitively supports shifts in posture. Five star base with casters for easy mobility. Integrated arms for support.