 We present a novel silicon-based pneumatactor array controlled by a sequence of high-frequency air walls engineered to deliver vibrotactile feedback. The device is constructed using high-speed switching relays, solenoid walls, and silicon pneumatactors. A PWM signal controls the direction of airflow within the walls, alternating their opening and closing to inflate and deflate the pneumatactors. At high frequencies, the pneumatactor diaphragms oscillate rapidly, up to 90 Hz. The setup can be multiplexed to form arrays of pneumatactors. Each of them have differential wall thickness, resulting in unidirectional inflation and deflation. An array of pneumatactors can create interesting haptic patterns suitable for a range of applications in prosthetics, VR, and beyond.