Grainger pneumatic vibrators enhance material flow and prevent buildup in bins, hoppers, and chutes using compressed air to power an internal piston. Features include 7 models with 133-4448 lbs force, aluminum, steel, and rubber construction, 40-150 PSI air pressure, rotary and ball bearing options, adjustable mounts, vibration isolation, weights from 3.5-39 lbs, and a 1-year warranty. These compact vibrators offer heavy-duty performance for industrial material handling.