Low profile window well cover keeps out rain, snow, and debris. Easy installation. Snaps On/Off for ventilation and cleaning. Improves basement insulation. Durable, impact-resistant plastic. Use a low profile cover when the top of the window is at or below the top of the area wall. 44" x 25" x 4", 112cm x 64cm x 10.20cm, Type X, rectangular. 5 year warranty.