If your 20-inch 3-speed Midea box fan isn't operating as smoothly as it should, it might be time to replace the blade (12156000A03888). A wobbling or noisy fan can be a sign that the blade has become imbalanced or damaged. It's important to ensure your fan operates quietly and efficiently during those warm days. This genuine Midea appliance blade is designed specifically for your box fan, ensuring a perfect fit and optimal performance. Before purchasing, verify your appliance's model number for compatibility.