Alpha - M/B with Black Base (no Arm)The Alpha medium back chair delivers reliable ergonomic support with a clean, minimalist design. Built for practical office use, it includes a heavy duty 4 lever mechanism for independent control over seat tilt, back angle, and height adjustment. The ratchet back allows the user to easily set their preferred backrest height, while the smooth gas lift offers flexible height positioning for different desk setups. Upholstered in durable black PU or